Published March 29, 2023
| Version v1
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A telecom-wavelength quantum repeater node based on a trapped-ion processor
Creators
- 1. Institut für Experimentalphysik, Universität Innsbruck; Institut f ̈ur Quantenoptik und Quanteninformation
- 2. Institut für Experimentalphysik, Universität Innsbruck
- 3. Institut de Physique Theorique, Universite Paris-Saclay, CEA, CNRS
Description
A quantum repeater node is presented based on trapped ions that act as single photon emitters,
quantum memories and an elementary quantum processor. The node’s ability to establish entanglement across two 25 km-long optical fibers independently, then to swap that entanglement efficiently
to extend it over both fibers, is demonstrated. The resultant entanglement is established between
telecom-wavelength photons at either end of the 50 km channel. Finally, the system improvements
to allow for repeater-node chains to establish stored entanglement over 800 km at Hertz rates are
calculated, revealing a near-term path to distributed networks of entangled sensors, atomic clocks
and quantum processors.
Notes
This work was financially supported by the START
prize of the Austrian FWF project Y 849-N20, the Aus-
trian FWF Standalone project QMAP with project num-
ber P 34055, the Institute for Quantum Optics and Quan-
tum Information (IQOQI) of the Austrian Academy Of
Sciences (OeAW) and the European Union's Horizon
2020 research and innovation program under grant agree-
ment No 820445 and project name 'Quantum Internet
Alliance'. We acknowledge funding for V. Krutyanskiy
by the Erwin Schr ̈odinger Center for Quantum Science
& Technology (ESQ) Discovery Programme, for N.S. by
the Commissariat `a l'Energie Atomique et aux Energies
Alternatives (CEA), and for B.P.L. by the CIFAR Quan-
tum Information Science Program of Canada.
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