2024-03-29T11:36:26Z
https://zenodo.org/oai2d
oai:zenodo.org:5509278
2021-09-15T13:48:24Z
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software
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Debnath, Kamanasish
Dold, Gavin
Morton, John
Mølmer, Klaus
2020-09-22
<p>The zip file contains Matlab codes which was used to generate the results reported in Phys. Rev. Lett. <strong>125</strong>, 137702</p>
https://doi.org/10.1103/PhysRevLett.125.137702
oai:zenodo.org:5509278
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Self-Stimulated Pulse Echo Trains from Inhomogeneously Broadened Spin Ensembles
info:eu-repo/semantics/other
oai:zenodo.org:3522309
2020-04-22T08:01:31Z
user-nanoqtech-h2020
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Serrano, Diana
Deshmukh, Chetan
Liu, Shuping
Tallaire, Alexandre
Ferrier, Alban
de Reidmatten, Hugues
Goldner, Philippe
2019-10-29
<p>Data corresponding to the figures of the publication " Coherent optical and spin spectroscopy of nanoscale Pr3+: Y2O3" by D. Serrano et al. (file:///C:/Users/diana.serrano/Zotero/storage/86IZ7H73/PhysRevB.100.html). A text file describes data in each compressed folder, please refer to the publication for more details. </p>
https://doi.org/10.5281/zenodo.3522309
oai:zenodo.org:3522309
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https://doi.org/10.5281/zenodo.3522308
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Data of publication Coherent optical and spin spectroscopy of nanoscale Pr3+ : Y2O3
info:eu-repo/semantics/other
oai:zenodo.org:3552201
2020-01-20T15:27:35Z
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Hunger, David
2019-11-25
<p>Presentation at the EQTC Conference, Grenoble, Feb. 2019</p>
https://doi.org/10.5281/zenodo.3552201
oai:zenodo.org:3552201
eng
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https://doi.org/10.5281/zenodo.3552200
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Quantum Technologies
Rare Earth Ions
Quantum Computing
Quantum Networks
Scalable Rare-Earth Ion Quantum Computing Nodes
info:eu-repo/semantics/lecture
oai:zenodo.org:6351396
2022-03-14T13:49:17Z
user-square
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Vadia
Karrai
Thierschmann
Schäfermeier
Dal Savio
Scherzer
Högele
Taniguchi
Watanabe
Hunger
2021-10-27
<p>The introduction of an optical resonator can enable efficient and precise interaction between a photon<br>
and a solid-state emitter. It facilitates the study of strong light-matter interaction, polaritonic physics and<br>
presents a powerful interface for quantum communication and computing. A pivotal aspect in the progress<br>
of light-matter interaction with solid-state systems is the challenge of combining the requirements of cryo-<br>
genic temperature and high mechanical stability against vibrations while maintaining sufficient degrees of<br>
freedom for in situ tunability. Here, we present a fiber-based open Fabry-Pérot cavity in a closed-cycle<br>
cryostat exhibiting ultrahigh mechanical stability while providing wide-range tunability in all three spatial<br>
directions. We characterize the setup and demonstrate the operation with the root-mean-square cavity-<br>
length fluctuation of less than 90 pm at temperature of 6.5 K and integration bandwidth of 100 kHz.<br>
Finally, we benchmark the cavity performance by demonstrating the strong-coupling formation of exciton<br>
polaritons in monolayer WSe2 with a cooperativity of 1.6. This set of results manifests the open cavity in<br>
a closed-cycle cryostat as a versatile and powerful platform for low-temperature cavity QED experiments.</p>
https://doi.org/10.1103/PRXQuantum.2.040318
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Open-Cavity, Closed-Cycle Cryostat, Quantum Optics Platform
Open-Cavity in Closed-Cycle Cryostat as a Quantum Optics Platform
info:eu-repo/semantics/article
oai:zenodo.org:4905692
2021-06-08T01:48:57Z
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Kumar, Kuppusamy Senthil
Serrano, Diana
Nonat, Aline
Heinrich, Benoît
Karmazin, Lydia
Charbonnière, Loïc
Goldner, Philippe
Ruben, Mario
2021-06-07
<p>The success of the emerging field of solid-state optical quantum information processing (QIP) critically depends on the access to resonant optical materials. Rare-earth ion (REI)- based molecular systems, whose quantum properties could be tuned taking advantage of molecular engineering strategies, are one of the systems actively pursued for the imple- mentation of QIP schemes. Herein, we demonstrate the efficient polarization of ground-state nuclear spins—a fundamental requirement for all-optical spin initialization and addressing—in a binuclear Eu(III) complex, featuring inhomogeneously broadened 5D0 → 7F0 optical tran- sition. At 1.4 K, long-lived spectral holes have been burnt in the transition: homogeneous linewidth (Γh) = 22 ± 1 MHz, which translates as optical coherence lifetime (T2opt) = 14.5 ± 0.7 ns, and ground-state spin population lifetime (T1spin) = 1.6 ± 0.4 s have been obtained. The results presented in this study could be a progressive step towards the realization of molecule-based coherent light-spin QIP interfaces.</p>
https://doi.org/10.1038/s41467-021-22383-x
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Optical spin-state polarization in a binuclear europium complex towards molecule-based coherent light-spin interfaces
info:eu-repo/semantics/article
oai:zenodo.org:6552676
2022-05-16T13:49:36Z
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user-eu
Harada, N.
Ferrier, A.
Serrano, D.
Goldner, P.
Tallaire, A.
2022-05-16
<p>Poster on rare earth doped Y2O3 thin films grown by chemical vapor deposition presented by Nao Harada at a doctoral school meeting (2020/10).</p>
https://doi.org/10.5281/zenodo.6552676
oai:zenodo.org:6552676
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https://doi.org/10.5281/zenodo.6552675
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Elaboration of Rare Earth Oxide Thin Films for Quantum Technologies
info:eu-repo/semantics/conferencePoster
oai:zenodo.org:3733498
2020-05-03T17:50:54Z
user-nanoqtech-h2020
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B. Casabone
C. Deshmukh
S. Liu
D. Serrano
A. Ferrier
T. Hummer
P. Goldner
D. Hunger
H. de Riedmatten
2019-10-14
<p>Single atoms or solid-state emitters are very promising candidates for building quantum network nodes as they provide for a spin-photon interface that also has quantum information processing capabilities. Among solid-state materials, rare earth ion-doped crystals constitute a promising platform for quantum information processing and networking. They feature exceptional spin coherence time to store information, narrow optical transitions to act as an interface to optical photons (including at telecom wavelength for erbium ions), and possibilities to realize quantum gates between single ion qubits. Coupling quantum emitters to optical cavities enables channelling the emission from the emitters into the cavity mode while decreasing their emission lifetime. This allows the realization of an efficient and high-rate spin-photon interface, while also increasing the indistinguishability of the emitted photons in the presence of dephasing. However, a reduction in the excited state lifetime also reduces the time available to realize quantum gates that rely on a dipole-blockade mechanism achieved by driving the emitter to the excited state. Dynamic control of the Purcell factor would hence enable decoupling the emitter from the cavity when performing gates, and coupling it back at a desired time to emit a single-photon with a tunable waveshape. </p>
<p>In this work [1], by utilizing erbium-doped nanoparticles coupled to a fully tunable high-finesse fiber-based optical cryogenic microcavity, we demonstrate a Purcell factor of 31 that can be controlled on a timescale of 100 microseconds, which is more than 100 times faster than the spontaneous emission lifetime of the erbium ions. This is achieved by tuning the length of the cavity, and hence its resonance frequency, via a piezoelectric device with sub-nanometre precision. Additionally, we demonstrate that this technique can be operated with a bandwidth high enough to shape deterministically the spontaneous emission of the erbium ions. With some improvements, this technique has the potential to reach switching times of a few microseconds. Combined with single-ion addressing, this ability will enable the generation of fully tunable narrowband single photons at telecom wavelengths, and quantum processing using single rare-earth-ions. Our approach therefore opens the door to a solid-state quantum node with the potential of exhibiting quantum computing and communication capabilities all in a single device. </p>
<p> </p>
<p>[1] Bernardo Casabone, Chetan Deshmukh, Shuping Liu, Diana Serrano, Alban Ferrier, Thomas Hümmer, Philippe Goldner, David Hunger, and Hugues de Riedmatten, “Dynamic control of Purcell enhanced emission of erbium ions in nanoparticles”, arXiv:2001.08532 (2020)</p>
https://doi.org/10.5281/zenodo.3733498
oai:zenodo.org:3733498
eng
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https://doi.org/10.5281/zenodo.3733497
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Quantum simulation and computation, Spain, 14-18/10/2019
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Dynamic control of Purcell enhanced emission of Er ions in nanocrystals
info:eu-repo/semantics/conferencePoster
oai:zenodo.org:5509324
2021-09-15T13:48:24Z
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software
user-eu
Debnath, Kamanasish
Kiilerich, Alexander Holm
Benseny, Albert
Mølmer, Klaus
2019-08-09
<p>Contains numercal code used for generating the results reported in Phys. Rev. A <strong>100</strong>, 023813</p>
https://doi.org/10.5281/zenodo.5509324
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https://doi.org/10.5281/zenodo.5509323
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Coherent spectral hole burning and qubit isolation by stimulated Raman adiabatic passage
info:eu-repo/semantics/other
oai:zenodo.org:6473386
2022-04-21T01:49:19Z
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user-eu
Peng Xu
Shi-Liang Zhu
Klaus Molmer
Alexander Holm Kiilerich
2020-09-10
<p>We present a scheme that allows integration of the Berry curvature and thus determination of the Chern number<br>
of a qubit eigenstate manifold. Our proposal continuously couples the qubit with a meter system while it explores<br>
a quasiadiabatic path in the manifold. The accumulated change of one of the meter observables then provides<br>
an estimate of the Chern number. By varying the initial state of the meter, we explore the delicate interplay<br>
between the measurement precision and the disturbance of the qubit. A simple argument yields a correction factor<br>
that allows estimation of the Chern number, even when the qubit is significantly disturbed during the probing.<br>
The Chern number arises from the geometric phase accumulated during the exploration, while we observe the<br>
dynamic phase to produce a broadening of the meter wave function. We show that a protocol, relying on three<br>
subsequent explorations, allows cancellation of the dynamic phase while the geometric phase is retained.</p>
https://doi.org/10.1103/PhysRevA.102.032613
oai:zenodo.org:6473386
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Integration of the Berry curvature on a qubit state manifold by coupling to a quantum meter system
info:eu-repo/semantics/article
oai:zenodo.org:6365167
2022-03-17T13:49:27Z
user-square
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Beattie, Eduardo
Deshmukh, Chetan
Casabone, Bernardo
Grandi, Samuele
Serrano, Diana
Ferrier, Alban
Goldner, Philippe
Hunger, David
de Riedmatten, Hugues
2022-03-17
<p>Contributed talk to the ICFO-UNAM-UniAndes International School on the Frontiers of Light: https://frontiers.icfo.eu/icfo-unam-uniandes/</p>
https://doi.org/10.5281/zenodo.6365167
oai:zenodo.org:6365167
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https://doi.org/10.5281/zenodo.6365166
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Towards detection of single erbium ions in a tuneable fiber micro-cavity
info:eu-repo/semantics/lecture
oai:zenodo.org:3533148
2020-04-22T13:33:07Z
user-nanoqtech-h2020
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Debnath, Kamanasish
Holm Kiilerich, Alexander
Benseny, Albert
Mølmer, Klaus
2019-08-09
<p>We describe how stimulated Raman adiabatic passage (STIRAP) can be applied to create spectral holes in an inhomogeneously broadened system. Due to the robustness of STIRAP, our proposal guarantees a high flexibility and accuracy, and at variance with traditional spectral hole burning techniques, it may require substantially fewer time resources since it does not rely upon the spontaneous decay of an intermediate excited state. We investigate the effects on the scheme of dephasing and dissipation as well as of unintentional driving of undesired transitions due to a finite splitting of the initial and target states. Finally, we show that the pulses can be reversed to create narrow absorption structures inside a broad spectral hole, which can be used as qubits for precise quantum operations on inhomogeneously broadened few-level systems.</p>
https://doi.org/10.1103/PhysRevA.100.023813
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Coherent spectral hole burning and qubit isolation by stimulated Raman adiabatic passage
info:eu-repo/semantics/article
oai:zenodo.org:3726874
2020-03-26T08:20:12Z
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Goldner, P.
2020-03-25
<p>This invited presentation was given at the DWC Symposium in Dunedin, New Zealand in 2019. Recent developments in rare-earth doped nanomaterials for quantum technologies are discussed.</p>
https://doi.org/10.5281/zenodo.3726874
oai:zenodo.org:3726874
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https://doi.org/10.5281/zenodo.3726873
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Rare Earth Doped Nanoparticles for Quantum Technologies
info:eu-repo/semantics/lecture
oai:zenodo.org:6365321
2022-03-17T13:49:27Z
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Kinos, Adam
Rippe, Lars
Walther, Andreas
Kröll, Stefan
2022-03-01
<p>The zip file contains the data for all figures shown in the article Phys. Rev. A <strong>105</strong>, 032608. The .fig format can be opened natively in matlab, or with other open languages such as python, and in either case the data can be extracted with legends as it appears in the publication.</p>
https://doi.org/10.5281/zenodo.6365321
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https://doi.org/10.5281/zenodo.6365320
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Microscopic treatment of instantaneous spectral diffusion and its effect on quantum gate fidelities in rare-earth-ion-doped crystals
info:eu-repo/semantics/article
oai:zenodo.org:6365415
2022-03-17T13:50:14Z
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Walther, Andreas
2021-12-01
<p>Poster presented at the Lund Laser Center Strategy day 2021-12-01.</p>
https://doi.org/10.5281/zenodo.6365415
oai:zenodo.org:6365415
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https://doi.org/10.5281/zenodo.6365414
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Roadmap to Rare-Earth Quantum Computing
info:eu-repo/semantics/conferencePoster
oai:zenodo.org:6321977
2022-03-02T14:03:10Z
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Harada, N.
Tallaire, A.
Serrano, D
Seyeux, A
Marcus, P.
Portier, X.
Labbé, C.
Goldner, P.
Ferrier, A.
2021-10-18
<p>Rare earth (RE) doped oxides have demonstrated great potential for photonic applications and have also appeared as promising candidates for quantum memory devices and microwave to optical transducers. Here, we investigate the potential of Chemical Vapor Deposited (CVD) europium-doped Y2O3 thin films on silicon as a new platform for integrated quantum devices. We aim at improving the optical properties of such thin films by carefully controlling the RE ion's environment. In particular, we study the effect of annealing post treatments and demonstrate that a significant source of broadening of the optical transition arises from interfacial reactions with the silicon substrate. We thus propose to encapsulate RE ions between undoped high-quality thick layers in order to limit the impact of interfacial reactions on their properties during thermal annealing. Using this approach, we succeeded in measuring a narrow inhomogeneous linewidth of 18 GHz and an ultra-narrow homogeneous linewidth of 5 MHz inferred from spectral hole width. These results are promising towards the use of these engineered RE doped thin films for the development of a scalable nanostructured spin-photon interface. In addition, our strategy could be applied to a large variety of oxide films for a broad range of applications. Paper published in Materials Advances.</p>
https://doi.org/10.1039/D1MA00753J
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Controlling the interfacial reactions and environment of rare-earth ions in thin oxide films towards wafer-scalable quantum technologies
info:eu-repo/semantics/article
oai:zenodo.org:5509302
2021-09-15T13:48:24Z
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software
user-eu
Debnath, Kamanasish
Zhang, Yuan
Mølmer, Klaus
2019-11-11
<p>The zip file contains the numerical code used for generating the figures.</p>
https://doi.org/10.5281/zenodo.5509302
oai:zenodo.org:5509302
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https://doi.org/10.5281/zenodo.5509301
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Collective dynamics of inhomogeneously broadened emitters coupled to an optical cavity with narrow linewidth
info:eu-repo/semantics/other
oai:zenodo.org:6498981
2022-04-28T13:49:49Z
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Harada, N.
Tallaire, A.
Serrano, D.
Seyeux, A.
Marcus, P.
Portier, X.
Labbé, C.
Goldner, P.
Ferrier, A.
2022-04-27
<p>Data of the figures in the paper :</p>
<p>N. Harada, A. Tallaire, D. Serrano, A. Seyeux, P. Marcus, X. Portier, C. Labbé, P. Goldner, and A. Ferrier, <em>Controlling the Interfacial Reactions and Environment of Rare-Earth Ions in Thin Oxide Films towards Wafer-Scalable Quantum Technologies</em>, Mater. Adv. <strong>3</strong>, 300 (2022). doi: 10.1039/D1MA00753J</p>
https://doi.org/10.5281/zenodo.6498981
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https://doi.org/10.5281/zenodo.6498980
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Data of paper Controlling the interfacial reactions and environment of rare-earth ions in thin oxide films towards wafer-scalable quantum technologies
info:eu-repo/semantics/other
oai:zenodo.org:6478029
2022-04-23T13:49:29Z
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Horvath, Sebastian P.
Shi, Chunyan
Gustavsson, David
Walther, Andreas
Kinos, Adam
Kröll, Stefan
Rippe, Lars
2022-03-23
<p>This upload contains the article as publish in New J. Phys. 24 (2022) 033034.</p>
https://doi.org/10.1088/1367-2630/ac5932
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Slow light frequency reference cavities—proof of concept for reducing the frequency sensitivity due to length fluctuations
info:eu-repo/semantics/article
oai:zenodo.org:4090336
2021-02-18T00:27:25Z
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Ferrier, Alban
Harada, Nao
Scarafagio, Marion
Briand, Emrick
Ganem, Jean-Jacques
Vickridge, Ian
Seyeux, Antoine
Marcus, Philippe
Serrano, Diana
Goldner, Philippe
Tallaire, Alexandre
2020-08-18
<p>The control of rare-earth ion doping profiles is a key challenge for several photonic applications and quantum technologies that require spatially localized emitters. In this work, we propose to use atomic layer deposition (ALD) followed by an annealing post-treatment to localize europium emitters close to the surface of a Y<sub>2</sub>O<sub>3</sub> film or a Y<sub>2</sub>SiO<sub>5</sub> single crystal by exploiting in-diffusion. Indeed, ALD is a conformal method that can provide in-depth nanometer-scale positioning accuracy on a large scale. However, the post-thermal annealing required to achieve higher crystalline quality and activate diffusion needs to be precisely controlled to maximize our ability to localize ions. In this paper, we evaluate europium ion diffusion in an ALD-grown Eu<sub>2</sub>O<sub>3</sub>/Y<sub>2</sub>O<sub>3</sub>/Si stack using Rutherford backscattering spectroscopy (RBS) and time-of-flight secondary ion mass spectrometry (TOF-SIMS). We then extend this approach to investigate diffusion from a Eu<sub>2</sub>O<sub>3</sub> ALD film into a single-crystalline substrate of Y<sub>2</sub>SiO<sub>5</sub> (YSO), a technologically relevant material system for quantum applications. We determine the Eu<sup>3+</sup> diffusion coefficients in both cases and show that diffusion starts at 950 °C in the polycrystalline Y<sub>2</sub>O<sub>3</sub> ALD submicron film, whereas it becomes significant only above 1200 °C in single-crystal YSO. Finally, spectral hole burning of such in-diffused emitters revealed homogeneous lines as narrow as 2 MHz. This study indicates that appropriate annealing of ALD-grown rare-earth oxide films can be harnessed to create localized dopants that preserve their outstanding optical properties, a prerequisite for their integration into photonic and quantum devices.</p>
https://doi.org/10.1021/acs.jpcc.0c04019
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Harnessing Atomic Layer Deposition and Diffusion to Spatially Localize Rare-Earth Ion Emitters
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oai:zenodo.org:5509263
2021-09-15T13:48:24Z
user-square
software
user-eu
Debnath, Kamanasish
Kiilerich, Alexander Holm
Mølmer, Klaus
2021-04-08
<p>The zip file contains the numerical code used for generating the figures reported in Phys. Rev. A <strong>103</strong>, 043705</p>
https://doi.org/10.1103/PhysRevA.103.043705
oai:zenodo.org:5509263
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Ancilla-mediated qubit readout and heralded entanglement between rare-earth dopant ions in crystals
info:eu-repo/semantics/other
oai:zenodo.org:3726854
2020-03-26T08:20:11Z
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Fossati, A.
de Feudis, M.
Liu, S.
Serrano, D.
Ferrier, A.
Brinza, O.
Achard, J.
Tallaire, A.
Goldner, Ph.
2020-03-25
<p>A presentation given at the Europen Quantum Technology Conference, organized in the framework of the Quantum Flagship, in Grenoble, Feb. 2019. It gives an overview of current results in diamond and rare earth doped nanomaterials.</p>
https://doi.org/10.5281/zenodo.3726854
oai:zenodo.org:3726854
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https://doi.org/10.5281/zenodo.3726853
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rare earth
quantum technologies
square
Nanomaterials with Optically Addressable Spins for Quantum Technologies
info:eu-repo/semantics/lecture
oai:zenodo.org:5959634
2022-03-02T14:03:15Z
user-square
user-eu
Kinos, Adam
Rippe, Lars
Kröll, Stefan
Walther, Andreas
2021-11-30
<p>The zip file contains the data for all figures shown in the article Phys. Rev. A <strong>104</strong>, 052624. The .fig format can be opened natively in matlab, or with other open languages such as python, and in either case the data can be extracted with legends as it appears in the publication.</p>
https://doi.org/10.5281/zenodo.5959634
oai:zenodo.org:5959634
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https://doi.org/10.5281/zenodo.5959633
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Designing gate operations for single-ion quantum computing in rare-earth-ion-doped crystals
info:eu-repo/semantics/article
oai:zenodo.org:3714919
2020-03-18T20:20:12Z
user-square
openaire
user-eu
Kolesov, Roman
2020-03-18
<p>Presentation on progress in cavity QED with rare-earth ions and on new ODMR active defects in diamond. Presented at Frontiers of Nonlinear Physics FNP-2019, Nizhny Novgorod, Russia</p>
https://doi.org/10.5281/zenodo.3714919
oai:zenodo.org:3714919
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https://doi.org/10.5281/zenodo.3714918
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New playground for diamond quantum optics: 446nm ODMR-active center of unknown origin
info:eu-repo/semantics/lecture
oai:zenodo.org:6372416
2022-03-21T13:49:19Z
user-square
openaire
user-eu
Hunger, David
2022-03-21
<p>Presentation of the SQUARE Project during the European Quantum Week</p>
https://doi.org/10.5281/zenodo.6372416
oai:zenodo.org:6372416
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https://doi.org/10.5281/zenodo.6372415
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SQUARE Project Presentation
info:eu-repo/semantics/lecture
oai:zenodo.org:3736425
2020-05-03T17:50:53Z
user-nanoqtech-h2020
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openaire
user-eu
B. Casabone
C. Deshmukh
S. Liu
D. Serrano
A. Ferrier
T. Hummer
P. Goldner
D. Hunger
H. de Riedmatten
2020-04-01
<p>Data for the poster presented in the conference Quantum simulation and computation, Spain, 14-18/10/2019</p>
<p>https://zenodo.org/record/3733498#.XoSaAy-w3PA</p>
<p> </p>
https://doi.org/10.5281/zenodo.3736425
oai:zenodo.org:3736425
eng
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https://doi.org/10.5281/zenodo.3733498
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https://doi.org/10.5281/zenodo.3736424
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quantum technologies
Data for poster Dynamic control of Purcell enhanced emission of Er ions in nanocrystals
info:eu-repo/semantics/conferencePoster
oai:zenodo.org:5509286
2021-09-15T15:27:41Z
user-nanoqtech-h2020
user-square
software
user-eu
Debnath, Klaus
Zhang, Yuan
Mølmer, Klaus
2018-12-26
<p>Zip file contains the numerical codes used for generating the figures.</p>
https://doi.org/10.5281/zenodo.5509286
oai:zenodo.org:5509286
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https://doi.org/10.5281/zenodo.5509285
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Lasing in the superradiant crossover regime
info:eu-repo/semantics/other
oai:zenodo.org:3726932
2020-03-26T08:20:11Z
user-square
openaire
user-eu
N. Harada
A. Tallaire
A. Ferrier
M. Scarafagio
D. Serrano
Ph. Goldner
2020-03-25
<p>This poster was presented during the Ph.D. days at Sorbonne University doctoral school in 2019. It presents results on thin films doped with rare-earth ions for quantum technologies.</p>
https://doi.org/10.5281/zenodo.3726932
oai:zenodo.org:3726932
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https://doi.org/10.5281/zenodo.3726931
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Elaboration of Rare Earth Oxide Thin Films for Quantum Technologies
info:eu-repo/semantics/conferencePoster
oai:zenodo.org:6365362
2022-03-17T14:07:20Z
user-square
user-eu
Kinos, Adam
Rippe, Lars
Serrano, Diana
Walther, Andreas
Kröll, Stefan
2022-03-01
<p>The zip file contains the data for all figures shown in the article Phys. Rev. A <strong>105</strong>, 032603. The .fig format can be opened natively in matlab, or with other open languages such as python, and in either case the data can be extracted with legends as it appears in the publication.</p>
https://doi.org/10.5281/zenodo.6365362
oai:zenodo.org:6365362
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https://doi.org/10.5281/zenodo.6365361
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High connectivity quantum processor nodes using single-ion-qubits in rare-earth-ion-doped crystals
info:eu-repo/semantics/article
oai:zenodo.org:6394563
2022-03-30T13:49:35Z
user-square
Yan, Ying
Shi, Chunyan
Kinos, Adam
Syed, Hafsa
Horvath, Sebastian P.
Walther, Andreas
Rippe, Lars
Chen, Xi
Kröll, Stefan
2021-09-14
<p>The zip file contains the data for all figures shown in the article Nature npj Quantum Information (2021)7:138. The .fig format can be opened natively in matlab, or with other open languages such as python, and in either case the data can be extracted with legends as it appears in the publication.</p>
https://doi.org/10.5281/zenodo.6394563
oai:zenodo.org:6394563
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https://doi.org/10.5281/zenodo.6394562
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Experimental implementation of precisely tailored light-matter interaction via inverse engineering
info:eu-repo/semantics/article
oai:zenodo.org:6396216
2022-03-31T01:49:37Z
user-square
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Horvath, Sebastian P.
Alqedra, Mohammed K.
Kinos, Adam
Walther, Andreas
Dahlström, Jan Marcus
Kröll, Stefan
Rippe, Lars
2021-05-07
<p>The zip file contains the data for all figures shown in the article Physical Review Research 3, 023099 (2021). The data is given in .txt format, which can be opened by any program, and some details on our formatting can be found in the associated readme file.</p>
https://doi.org/10.1103/PhysRevResearch.3.023099
oai:zenodo.org:6396216
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Noise-free on-demand atomic frequency comb quantum memory
info:eu-repo/semantics/article
oai:zenodo.org:8037272
2023-06-25T14:27:07Z
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openaire_data
Körber, Jonathan
Pallmann, Maximilian
Heupel, Julia
Stöhr, Rainer
Vasilenko, Evgenij
Hümmer, Thomas
Kohler, Larissa
Popov, Cyril
Hunger, David
2023-06-14
<p>Dataset for all the figures of the paper "Scanning cavity microscopy of a single-crystal diamond membrane"</p>
<p>Phys. Rev. Applied 19, 064057</p>
<p>10.1103/PhysRevApplied.19.064057</p>
<p>https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.19.064057 </p>
<p> </p>
<p> </p>
https://doi.org/10.5281/zenodo.8037272
oai:zenodo.org:8037272
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https://doi.org/10.5281/zenodo.8037271
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Physical Review Applied, 19(6), (2023-06-14)
Data of the paper Scanning cavity microscopy of a single-crystal diamond membrane
info:eu-repo/semantics/other
oai:zenodo.org:6472050
2022-04-21T01:49:18Z
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user-eu
Serrano, Diana
Kuppusamy, Senthil Kumar
Heinrich, Benoit
Fuhr, Olaf
Hunger, David
Ruben, Mario
Goldner, Philippe
2022-04-20
<p>Preprint of the paper: D. Serrano, S. K. Kuppusamy, B. Heinrich, O. Fuhr, D. Hunger, M. Ruben, and P. Goldner, <em>Ultra-Narrow Optical Linewidths in Rare-Earth Molecular Crystals</em>, Nature <strong>603</strong>, 241 (2022).</p>
<p>Rare-earth ions are promising solid-state systems to build light-matter inter- faces at the quantum level. This relies on their potential to show narrow optical homogeneous linewidths or, equivalently, long-lived optical quantum states. In this letter, we report on europium molecular crystals that exhibit linewidths in the 10s of kHz range, orders of magnitude narrower than other molecular centers. We harness this property to demonstrate efficient optical spin initialization, coherent storage of light using an atomic frequency comb, and optical control of ion-ion interactions towards implementation of quantum gates. These results illustrate the utility of rare-earth molecular crystals as a new platform for photonic quantum technologies that combines highly coherent emitters with the unmatched versatility in composition, structure, and integration capability of molecular materials.</p>
https://doi.org/10.1038/s41586-021-04316-2
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quantum technologies
molecule
Rare-Earth Molecular Crystals with Ultra-narrow Optical Linewidths for Photonic Quantum Technologies (Ultra-Narrow Optical Linewidths in Rare-Earth Molecular Crystals)
info:eu-repo/semantics/article
oai:zenodo.org:6365144
2022-03-17T13:49:27Z
user-square
openaire
Deshmukh, Chetan
Beattie, Eduardo
Casabone, Bernardo
Grandi, Samuele
Serrano, Diana
Ferrier, Alban
Goldner, Philippe
Hunger, David
de Riedmatten, Hugues
2022-03-17
<p>Poster presented at the Optically Addressable Spin Qubits for Quantum Networks and Quantum Computing conference: https://www.we-heraeus-stiftung.de/veranstaltungen/seminare/2021/optically-addressable-spin-qubits-for-quantum-networks-and-quantum-computing/main/</p>
https://doi.org/10.5281/zenodo.6365144
oai:zenodo.org:6365144
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https://doi.org/10.5281/zenodo.6365143
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Towards detection of single erbium ions in a tuneable fiber micro-cavity
info:eu-repo/semantics/conferencePoster
oai:zenodo.org:6477566
2022-04-22T13:49:13Z
user-square
user-eu
Kinos, Adam
Dalgaard, Mogens
Moelmer, Klaus
2022-04-08
<p>We discuss how coherent driving of a two-level quantum system can be used to induce a complex<br>
phase on the ground state and we discuss its geometric and dynamic contributions. While the global<br>
phase of a wave function has no physical signi cance, coherent dynamics in a two-level subspace<br>
provides relative phases and is an essential building block for more advanced dynamics in larger<br>
systems. In this regard, we note that one must be careful with intuitive accounts of the phase<br>
dynamics as it depends on the interaction picture applied. To mitigate ambiguities in practical<br>
analyses, we suggest to complement the Bloch sphere picture with the path taken by the ground<br>
state amplitude in the complex plane, and we show how the two-level pure state dynamics can serve<br>
as a starting point for the study of the dynamics explored in three-level lambda systems, four level<br>
tripod systems, and open quantum systems.</p>
https://doi.org/10.48550/arXiv.2204.04007
oai:zenodo.org:6477566
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Optical control of the complex phase of a quantum ground state amplitude
info:eu-repo/semantics/article
oai:zenodo.org:6365408
2022-03-17T13:49:28Z
user-square
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Walther, Andreas
2021-08-05
<p>Presentation given at the Heraeus Conference "Optically adressable spin qubits for quantum networks and quantum computing" (2021-08-05). A similar presentation was also given at "Net-working group, Co-Design Center for Quantum Advantage, Brookhaven National Laboratory" (2021-06-01) and the SQUARE Industry Workshop (2022-03-09).</p>
https://doi.org/10.5281/zenodo.6365408
oai:zenodo.org:6365408
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https://doi.org/10.5281/zenodo.6365407
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Roadmap for Rare-Earth Quantum Computing
info:eu-repo/semantics/lecture
oai:zenodo.org:6394277
2022-04-22T11:52:45Z
user-square
user-eu
Kinos, Adam
Hunger, David
Kolesov, Roman
Molmer, Klaus
de Riedmatten, Hugues
Goldner, Philippe
Tallaire, Alexandre
Morvan, Loic
Berger, Perrine
Welinski, Sacha
Karrai, Khaled
Rippe, Lars
Kröll, Stefan
Walther, Andreas
2021-03-29
<p>Several platforms are being considered as hardware for quantum technologies. For quantum computing (QC), superconducting qubits and artificially trapped ions are among the leading platforms, but many others also show promise, e.g. photons, cold atoms, defect centers including Rare-Earth (RE) ions. So far, results are limited to the regime of noisy intermediate scale qubits (NISQ), with a small number of qubits and a limited connectivity, and it is likely that future QC hardware will utilize several existing platforms in different ways. Thus, it currently makes sense to invest resources broadly and explore the full range of promising routes to quantum technology. Rare-earth ions in solids constitute one of the most versatile platforms for future quantum technology. One advantage is good coherence properties even when confined in strong natural traps inside a solid-state matrix. This confinement allows very high qubit densities and correspondingly strong ion-ion couplings. In addition, although their fluorescence is generally weak, cavity integration can enhance the emission greatly and enable very good connections to photonic circuits, including at the telecom wavelengths, making them promising systems for long-term scalability. The primary aim of this roadmap is to provide a complete picture of what components a RE quantum computer would consist of, to describe the details of all parts required to achieve a scalable system, and to discuss the most promising paths to reach it. In brief, we find that clusters of 50-100 single RE ions can act as high fidelity qubits in small processors, occupying only about (10 nm)^3. Due to the high capacity for integration of the RE systems, they be optically read out and connected to other such clusters for larger scalability. We make suggestions for future improvements, which could allow the REQC platform to be a leading one.</p>
https://doi.org/10.48550/arXiv.2103.15743
oai:zenodo.org:6394277
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Roadmap for Rare-earth Quantum Computing
info:eu-repo/semantics/preprint
oai:zenodo.org:6321998
2022-04-27T19:46:37Z
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Lafitte-Houssat, E.
Ferrier, A.
Afzelius, M.
Berger, P.
Morvan, L.
Welinski, S.
Goldner, P..
2021-11-09
<p>Rare earth ions are actively investigated as optically addressable spin systems for quantum technologies thanks to their long optical and spin coherence lifetimes. 171Yb3+,which has 1/2 electron and nuclear spins, recently raised interest for its simple hyperfine structure that moreover can result in long coherence lifetimes at zero magnetic field, an unusual property for paramagnetic rare earth ions. Here, we report on the optical inhomogeneous and homogeneous linewidths in 171Yb3+:Y2SiO5 (site 2) for different doping concentrations. While inhomogeneous linewidth is not correlated to 171Yb3+ concentration, the homogeneous one strongly decreases between 10 and 2 ppm doping level, reaching 255 Hz at 3 K. This is attributed to a slowing down of 171Yb3+ ground state spin flip-flops. Paper published in <a href="https://journals.ioffe.ru/journals/5">"Оптика и спектроскопия"</a>.</p>
https://doi.org/10.21883/OS.2022.01.51885.29-21
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Optical homogeneous and inhomogeneous linewidths in 171Yb3+:Y2SiO5
info:eu-repo/semantics/article
oai:zenodo.org:6364622
2022-03-17T13:49:26Z
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openaire
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Sacha Welinski
Lothaire Ulrich
Perrine Berger
Loic Morvan
2021-07-26
<p>Optical manipulation of photonic solid-state qubits such as rare-earth ions in single crystals need stable laser sources able to perform complex and high bandwidth excitation waveforms (adiabatic pulses, STIRAP, HSH pulses) [1,2]. Such waveforms can be generated using an acoustic-optical modulators (AOM) connected to an Arbitrary Waveform Generator (AWG) [4]. However, the limited bandwidth of AOMs sets a severe limitation in the bandwidth and frequency agility, typically a few MHz. Using an electro-optical modulator (EOM) such as a phase or an intensity modulator made of LiNbO3 make it possible to access to higher bandwidth, but it generates unwanted harmonics that can perturb the experiment, reducing the fidelity and/or the efficiency of the protocol [4]. There is currently no architecture able to give enough versatility and stability to perform parallel multiple qubit gates operations over a few GHz range.<br>
Here we develop a laser source that is able to deliver high-bandwidth optical signals at multiple frequencies over a span of 10 GHz (scalable to 100 GHz), with low optical and RF phase and intensity noise. The central wavelengths can be tuned to match the resonance of the different species of optical qubit (in our case Eu3+, or Er3+ ions in solid-state matrices). The architecture is based on the combination of multiple fixed-frequency laser sources at 1.5 μm. Each laser is externally modulated with a LiNbO3 IQ optical modulator and goes through a narrow optical filters to obtain the required performances in terms of arbitrary pulse shaping, signal-to-noise ratio and spurious suppression. After the optical signal combination, a non-linear up-conversion can be performed with high efficiency in order to get, for example, a central emission at 580 nm, typical for Eu3+ resonance wavelength.<br>
In this poster, we show the preliminary results in term of modulation bandwidth, spurious suppression and wavelength tuning.<br>
[1] M. Tian, et Al., APPLIED OPTICS, 50, 36 (2011)<br>
[2] A. Kinos, et Al., ArXiv 2103.15743 (2021)<br>
[3] J. Etesse et Al., PRA, 103, 2 (2021)<br>
[4] A. Walther, et Al., PRA? A 92, 022319 (2015)</p>
https://doi.org/10.5281/zenodo.6364622
oai:zenodo.org:6364622
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https://doi.org/10.5281/zenodo.6364621
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Stable and low-spurious laser source for fast addressing multiple optical qubits spread over a 100 GHz bandwidth
info:eu-repo/semantics/conferencePoster
oai:zenodo.org:6365424
2022-03-17T13:49:28Z
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Abdelatief, Abdullah Shehata
Walther, Andreas
2021-12-01
<p>Poster presented at the Lund Laser Center Strategy day 2021-12-01.</p>
https://doi.org/10.5281/zenodo.6365424
oai:zenodo.org:6365424
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https://doi.org/10.5281/zenodo.6365423
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Single rare-earth ion detection in microcavity for quantum information experiments
info:eu-repo/semantics/conferencePoster
oai:zenodo.org:3778205
2020-04-30T20:20:20Z
user-square
user-eu
Kornher, Thomas
Xiao, Da-Wu
Xia, Kangwei
Sardi, Fiammetta
Zhao, Nan
Kolesov, Roman
Wrachtrup, Jörg
2020-04-29
<p>Rare-earth related electron spins in crystalline hosts are unique material systems, as they can potentially provide a direct interface between telecom band photons and long-lived spin quantum bits. Specifically, their optically accessible electron spins in solids interacting with nuclear spins in their environment are valuable quantum memory resources. Detection of nearby individual nuclear spins, so far exclusively shown for few dilute nuclear spin bath host systems such as the nitrogen-vacancy center in diamond or the silicon vacancy in silicon carbide, remained an open challenge for rare earths in their host materials, which typically exhibit dense nuclear spin baths. Here, we present the electron spin spectroscopy of single Ce3+ ions in a yttrium orthosilicate host, featuring a coherence time of T2=124  μs. This coherent interaction time is sufficiently long to isolate proximal 89Y nuclear spins from the nuclear spin bath of 89Y. Furthermore, it allows for the detection of a single nearby 29Si nuclear spin, native to the host material with ∼5% abundance. This study opens the door to quantum memory applications in rare-earth ion related systems based on coupled environmental nuclear spins, potentially useful for quantum error correction schemes.</p>
https://doi.org/10.1103/PhysRevLett.124.170402
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Hybrid quantum systems
Nuclear & electron resonance
Quantum information with solid state qubits
Quantum Sensing
Single Photon Sources
Rare-earth doped crystals
Sensing Individual Nuclear Spins with a Single Rare-Earth Electron Spin
info:eu-repo/semantics/article
oai:zenodo.org:3762981
2020-04-23T20:20:20Z
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Kiilerich, Alexander Holm
Moelmer, Klaus
2019-09-18
<p>We present a formalism that accounts for the interaction of a local quantum system, such as an atom or a cavity, with traveling pulses of quantized radiation. We assume Markovian coupling of the stationary system to the input and output fields and nondispersive asymptotic propagation of the pulses before and after the interaction. This permits derivation of a master equation where the input and output pulses are treated as single oscillator modes that both couple to the local system in a cascaded manner. As examples of our theory, we analyze reflection by an empty cavity with phase noise, stimulated atomic emission by a quantum light pulse, and formation of a Schrödinger-cat state by the dispersive interaction of a coherent pulse and a single atom in a cavity.</p>
https://doi.org/10.1103/PhysRevLett.123.123604
oai:zenodo.org:3762981
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Cavity quantum electrodynamics
Open quantum systems & decoherence
Quantum networks
Quantum states of light
Input-Output Theory with Quantum Pulses
info:eu-repo/semantics/preprint
oai:zenodo.org:6365455
2022-03-17T13:49:28Z
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Walther, Andreas
2019-07-10
<p>Lecture given at SQUARE Summer school, Karlsruhe July 2019</p>
https://doi.org/10.5281/zenodo.6365455
oai:zenodo.org:6365455
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https://doi.org/10.5281/zenodo.6365454
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Introduction to rare-earth-ion quantum computing
info:eu-repo/semantics/lecture
oai:zenodo.org:6477552
2022-04-22T13:49:13Z
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Christiansen, Victor Rueskov
Kiilerich, Alexander Holm
Mølmer, Klaus
2022-03-16
<p>The interaction of a propagating pulse of quantum radiation with a localized quantum system<br>
can be described by a cascaded master equation with a distinct initially populated input and a<br>
finally populated output field mode [Phys. Rev. Lett.123, 123604 (2019)]. By transformation to an<br>
appropriate interaction picture, we identify the usual Jaynes-Cummings Hamiltonian between the<br>
scatterer and a superposition of the initial and final mode, with a strength given by the travelling<br>
pulse mode amplitude. The transformation also identifies a coupling of the scatterer with an orthogonal<br>
combination of the two modes. The transformed master equation offers important insights<br>
into the system dynamics and it permits numerically efficient solutions.</p>
https://doi.org/10.48550/arXiv.2203.07477
oai:zenodo.org:6477552
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Interaction of quantum systems with single pulses of quantized radiation
info:eu-repo/semantics/article
oai:zenodo.org:6499262
2022-04-28T13:49:47Z
user-square
openaire_data
user-eu
Lafitte-Houssat, E.
Ferrier, A.
Afzelius, M.
Berger, P.
Morvan, L.
Welinski, S.
Goldner, P..
2022-04-27
<p>Data of the paper: </p>
<p>E. Lafitte-Houssat, A. Ferrier, M. Afzelius, P. Berger, L. Morvan, S. Welinski, and P. Goldner, <em>Optical homogeneous and inhomogeneous linewidths in 171Yb3+:Y2SiO5</em>, Оптика и спектроскопия <strong>130</strong>, 23 (2022). (in Russian).</p>
https://doi.org/10.5281/zenodo.6499262
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https://doi.org/10.5281/zenodo.6499261
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Data of the paper Optical homogeneous and inhomogeneous linewidths in 171Yb3+:Y2SiO5
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oai:zenodo.org:5652030
2022-05-07T23:14:57Z
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user-eu
Serrano, Diana
Kumar Kuppusamy, Senthil
Heinrich, Benoît
Fuhr, Olaf
Hunger, David
Ruben, Mario
Goldner, Philippe
2021-11-07
<p>Data corresponding to main text Figures, Extended Data figures, and Supplementary Figures in publication 'Ultra-narrow Optical Linewidths in Rare-Earth Molecular Crystals, by D. Serrano, S. Kumar Kuppusamy, B. Heinrich, O. Fuhr, M. Ruben and P. Goldner.</p>
https://doi.org/10.5281/zenodo.5652030
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https://doi.org/10.5281/zenodo.5652029
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Data of publication Ultra-narrow Optical Linewidths in Rare-Earth Molecular Crystals
info:eu-repo/semantics/other
oai:zenodo.org:3731890
2020-04-09T20:20:17Z
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Groot-Berning, Karin
Kornher, Thomas
Jacob, Georg
Stopp, Felix
Dawkins, Samuel T.
Kolesov, Roman
Wrachtrup, Jörg
SInger, Kilian
Schmidt-Kaler, Ferdinand
2020-03-28
<p>Single dopant atoms or dopant-related defect centers in a solid state matrix are of particular importance<br>
among the physical systems proposed for quantum computing and communication, due to their potential to<br>
realize a scalable architecture compatible with electronic and photonic integrated circuits. Here, using a<br>
deterministic source of single laser-cooled Prþ ions, we present the fabrication of arrays of praseodymium<br>
color centers in yttrium-aluminum-garnet substrates. The beam of single Prþ ions is extracted from a Paul<br>
trap and focused down to 30(9) nm. Using a confocal microscope, we determine a conversion yield into<br>
active color centers of up to 50% and realize a placement precision of 34 nm.<br>
</p>
https://doi.org/10.1103/PhysRevLett.123.106802
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Deterministic Single-Ion Implantation of Rare-Earth Ions for Nanometer-Resolution Color-Center Generation
info:eu-repo/semantics/article
oai:zenodo.org:3726876
2020-03-26T08:20:11Z
user-square
openaire
user-eu
Goldner, P.
2020-03-25
<p>A tutorial on rare-earth ions for quantum technologies given during the square project summer school in 2019.</p>
https://doi.org/10.5281/zenodo.3726876
oai:zenodo.org:3726876
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https://doi.org/10.5281/zenodo.3726875
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The Quantum Lanthanoids
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oai:zenodo.org:6458478
2022-04-18T08:36:20Z
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Fossati, A.
Liu, S.
Karlsson, J.
Ikesue, A.
Tallaire, A.
Ferrier, A.
Serrano, D.
Goldner, P.
2022-04-13
<p>Data corresponding to main text figures of publication : A. Fossati, S. Liu, J. Karlsson, A. Ikesue, A. Tallaire, A. Ferrier, D. Serrano, and P. Goldner, <em>A Frequency-Multiplexed Coherent Electro-Optic Memory in Rare Earth Doped Nanoparticles</em>, Nano Lett. <strong>20</strong>, 7087 (2020).</p>
https://doi.org/10.5281/zenodo.6458478
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https://doi.org/10.5281/zenodo.6458477
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Data of publication A Frequency-Multiplexed Coherent Electro-optic Memory in Rare Earth Doped Nanoparticles
info:eu-repo/semantics/other
oai:zenodo.org:6477526
2022-04-22T13:49:13Z
user-square
user-eu
Casabone, Bernardo
Deshmukh, Chetan
Liu, Shuping
Serrano, Diana
Ferrier, Alban
Hümmer, Thomas
Goldner, Philippe
Hunger, David
de Riedmatten, Hugues
2021-06-11
<p>The interaction of single quantum emitters with an optical cavity enables the realization of<br>
efficient spin-photon interfaces, an essential resource for quantum networks. The dynamical<br>
control of the spontaneous emission rate of quantum emitters in cavities has important<br>
implications in quantum technologies, e.g., for shaping the emitted photons’ waveform or for<br>
driving coherently the optical transition while preventing photon emission. Here we<br>
demonstrate the dynamical control of the Purcell enhanced emission of a small ensemble of<br>
erbium ions doped into a nanoparticle. By embedding the nanoparticles into a fully tunable<br>
high finesse fiber based optical microcavity, we demonstrate a median Purcell factor of 15 for<br>
the ensemble of ions. We also show that we can dynamically control the Purcell enhanced<br>
emission by tuning the cavity on and out of resonance, by controlling its length with subnanometer<br>
precision on a time scale more than two orders of magnitude faster than the<br>
natural lifetime of the erbium ions. This capability opens prospects for the realization of<br>
efficient nanoscale quantum interfaces between solid-state spins and single telecom photons<br>
with controllable waveform, for non-destructive detection of photonic qubits, and for the<br>
realization of quantum gates between rare-earth ion qubits coupled to an optical cavity.</p>
https://doi.org/10.1038/s41467-021-23632-9
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Dynamic control of Purcell enhanced emission of erbium ions in nanoparticles
info:eu-repo/semantics/article
oai:zenodo.org:4081097
2021-01-20T17:33:37Z
user-nanoqtech-h2020
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Fossati, Alexandre
Liu, Shuping
karlsson, Jenny
Ikesue, Akio
Tallaire, Alexandre
Ferrier, Alban
Serrano, Diana
Goldner, Philippe
2020-08-26
<p>Quantum memories for light are essential components in quantum technologies like long-distance quantum communication and distributed quantum computing. Recent studies have shown that long optical and spin coherence lifetimes can be observed in rare earth doped nanoparticles, opening exciting possibilities over bulk materials, e.g., for enhancing coupling to light and other quantum systems, and material design. Here, we report on coherent light storage in Eu<sup>3+</sup>:Y<sub>2</sub>O<sub>3</sub> nanoparticles using the Stark echo modulation memory (SEMM) quantum protocol. We first measure a nearly constant Stark coefficient of 50 kHz/(V/cm) across a bandwidth of 15 GHz, which is promising for broadband operation. Storage of light is then demonstrated with an effective coherence lifetime of 5 μs. Pulses with two different frequencies are also stored, confirming frequency-multiplexing capability, and are used to demonstrate the memory high phase fidelity. These results open the way to nanoscale optical quantum memories with increased efficiency, bandwidth, and processing capabilities.</p>
https://doi.org/10.1021/acs.nanolett.0c02200
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A Frequency-Multiplexed Coherent Electro-optic Memory in Rare Earth Doped Nanoparticles
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oai:zenodo.org:6499101
2022-04-28T13:49:48Z
user-square
openaire_data
user-eu
Harada, Nao
Ferrier, Alban
Serrano, Diana
Persechino, Mauro
Briand, Emrick
Bachelet, Romain
Vickridge, Ian
Ganem, Jean-Jacques
Goldner, Philippe
Tallaire, Alexandre
2022-04-27
<p>Data of the figures of the paper:</p>
<p>N. Harada, A. Ferrier, D. Serrano, M. Persechino, E. Briand, R. Bachelet, I. Vickridge, J.-J. Ganem, P. Goldner, and A. Tallaire, <em>Chemically Vapor Deposited Eu 3+:Y 2O 3thin Films as a Material Platform for Quantum Technologies</em>, J. Appl. Phys. <strong>128</strong>, 055304 (2020). doi: <a href="https://doi.org/10.1063/5.0010833">10.1063/5.0010833</a></p>
<p> </p>
https://doi.org/10.5281/zenodo.6499101
oai:zenodo.org:6499101
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https://doi.org/10.5281/zenodo.6499100
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Data of paper Chemically vapor deposited Eu3+:Y2O3 thin films as a material platform for quantum technologies
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oai:zenodo.org:3711481
2020-04-29T13:03:17Z
user-nanoqtech-h2020
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user-eu
Zhang, Yu-Xiang
Yu, Chuan
Moelmer, Klaus
2020-02-19
<p>This article shows that chains of optical or microwave emitters coupled to a one-dimensional (1D) waveguide support subradiant states with close pairs of excited emitters, which have longer lifetimes than even the most subradiant states with only a single excitation. Exact, analytical expressions for nonradiative excitation dimer states are obtained in the limit of infinite chains. To understand the mechanism underlying these states, we present a formal equivalence between subradiant dimers and single localized excitations around a chain defect (unoccupied site). Our analytical mapping permits extension to emitter chains coupled to the 3D free space vacuum field.</p>
https://doi.org/10.1103/PhysRevResearch.2.013173
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Subradiant bound dimer excited states of emitter chains coupled to a one dimensional waveguide
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oai:zenodo.org:3521645
2020-04-22T08:01:34Z
user-nanoqtech-h2020
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user-eu
Serrano, Diana
Deshmukh, Chetan
Liu, Shuping
Tallaire, Alexandre
Ferrier, Alban
de Riedmatten, Hugues
Goldner, Philippe
2019-10-04
<p>We investigate the potential for optical quantum technologies of Pr3+: Y2O3 in the form of monodisperse<br>
spherical nanoparticles. We measured optical inhomogeneous lines of 27 GHz and optical homogeneous<br>
linewidths of 108 and 315 kHz in particles with 400- and 150-nm average diameters, respectively, for the<br>
1D2(0) ↔ 3H4(0) transition at 1.4 K. Furthermore, ground-state and 1D2 excited-state hyperfine structures in<br>
Y2O3 are here determined by spectral hole burning and modeled by complete Hamiltonian calculations. Groundstate spin transitions have energies of 5.99 and 10.42 MHz, for which we demonstrate spin inhomogeneous<br>
linewidths of 42 and 45 kHz, respectively. Spin T2 up to 880 μs was obtained for the ±3/2 ↔ ±5/2 transition<br>
at 10.42 MHz, a value which exceeds that of bulk Pr3+-doped crystals reported so far. These promising results<br>
confirm nanoscale Pr3+: Y2O3 is a very appealing candidate to integrate quantum devices. In particular, we<br>
discuss the possibility of using this material for realizing spin-photon interfaces emitting indistinguishable single<br>
photons.<br>
</p>
https://doi.org/10.1103/PhysRevB.100.144304
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Coherent optical and spin spectroscopy of nanoscale Pr3+ : Y2O3
info:eu-repo/semantics/article
oai:zenodo.org:6495402
2022-04-27T13:49:42Z
user-square
openaire_data
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Kuppusamy Senthil Kumar
Diana Serrano
Aline M. Nonat
Benoît Heinrich
Lydia Karmazin
Loïc J. Charbonnière
Philippe Goldner
Mario Ruben
2022-04-26
<p>Data of publication 'Optical spin-state polarization in a binuclear europium complex towards molecule-based coherent light-spin interfaces' by Kuppusamy Senthil Kumar et al. The two versions of Fig. 4d datasets correspond to the preprint version (https://zenodo.org/record/4905692#.Ymj9odpBxaQ) and publication version (https://www.nature.com/articles/s41467-021-22383-x), since a new set of data was taken during the review process. </p>
Preprint version of the article. Published version in Nature Communications can be found in full open access in https://www.nature.com/articles/s41467-021-22383-x
https://doi.org/10.5281/zenodo.6495402
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https://doi.org/10.5281/zenodo.6495401
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Data of publication 'Optical spin-state polarization in a binuclear europium complex towards molecule-based coherent light-spin interfaces'
info:eu-repo/semantics/other
oai:zenodo.org:4081219
2021-02-04T12:27:19Z
user-nanoqtech-h2020
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user-eu
Harada, Nao
Ferrier, Alban
Serrano, Diana
Persechino, Mauro
Briand, Emrick
Bachelet, Romain
Vickridge, Ian
Ganem, Jean-Jacques
Goldner, Philippe
Tallaire, Alexandre
2020-08-04
<p>Rare earth ions hosted in solids are good candidates for quantum technologies due to their chemical stability and optical and spin transitions exhibiting long coherence lifetimes. While bulk oxide crystals are usually the preferred host material, the development of a scalable silicon-compatible thin film platform would be desirable. In this paper, we report on the growth of Y<sub>2(1−x)</sub>Eu<sub>2x</sub>O<sub>3</sub> thin films on silicon in the full range of Eu<sup>3+</sup> concentration by direct liquid injection chemical vapor deposition (CVD). Our sub-micrometer polycrystalline films with a strong-(111) texture were grown for all compositions into the bixbyite cubic phase. The variation of growth rates with temperature and flow indicated that deposition occurred through a mass-transport controlled regime. Optical assessment of the Eu-doped thin films showed inhomogeneous linewidths as narrow as 50 GHz and fluorescence lifetimes of 1 ms for the lowest concentrations. Finally, a spectral hole was successfully burned in a 200 nm-thin film with a 2% Eu doping leading to a homogeneous linewidth of 11 MHz. These values are still below those reported for bulk single crystals indicating that additional decoherence mechanisms exist in such nanometric films, which might be alleviated by further improvement of the crystalline quality. Nevertheless, these results pave the way to the use of CVD-grown Eu:Y<sub>2</sub>O<sub>3</sub> thin films as a platform for integrated quantum devices.</p>
<p> </p>
https://doi.org/10.1063/5.0010833
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Chemically vapor deposited Eu3+:Y2O3 thin films as a material platform for quantum technologies
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