Propagating Gottesman-Kitaev-Preskill states encoded in an optical oscillator
Authors/Creators
- 1. University of Tokyo
- 2. RIKEN
- 3. National Institute of Information and Communications Technology
- 4. Palacký University, Olomouc
- 5. Johannes Gutenberg University of Mainz
Description
Gottesman-Kitaev-Preskill (GKP) qubit in a single Bosonic harmonic oscillator is an efficient logical qubit for mitigating errors in a quantum computer. The entangling gates and syndrome measurements for quantum error correction only require noise-robust linear operations, a toolbox that is naturally available and scalable in optical system. To date, however, GKP qubits have been only demonstrated at mechanical and microwave frequency in a highly nonlinear stationary system. In this work, we realize a GKP state in propagating light at the telecommunication wavelength and demonstrate homodyne measurements on the GKP states without loss corrections. Our states do not only show nonclassicality and non-Gaussianity at room temperature and atmospheric pressure, but the propagating wave property also permits large-scale quantum computation with strong compatibility to telecommunication technology.
Notes
Funding provided by: Japan Society for the Promotion of Science
Crossref Funder Registry ID: https://ror.org/00hhkn466
Award Number: 23K13040
Funding provided by: Japan Society for the Promotion of Science
Crossref Funder Registry ID: https://ror.org/00hhkn466
Award Number: 21J11615
Funding provided by: Czech Science Foundation
Crossref Funder Registry ID: https://ror.org/01pv73b02
Award Number: 22-08772S
Funding provided by: Czech Science Foundation
Crossref Funder Registry ID: https://ror.org/01pv73b02
Award Number: 21-13265X
Funding provided by: Japan Science and Technology Agency
Crossref Funder Registry ID: https://ror.org/00097mb19
Award Number: JPMJPR2254
Funding provided by: Moonshot Research and Development Program
Award Number: JPMJMS2064
Funding provided by: Moonshot Research and Development Program
Award Number: JPMJMS2066
Funding provided by: UTokyo Foundation
Award Number:
Funding provided by: Nichia Corporation
Award Number:
Funding provided by: Research Foundation for OptoScience and Technology
Award Number:
Funding provided by: CLUSTEC
Award Number: 101080173
Funding provided by: EU H2020-WIDESPREAD-2020-5
Award Number: NONGAUSS (951737)
Funding provided by: Federal Ministry of Education and Research
Crossref Funder Registry ID: https://ror.org/04pz7b180
Award Number:
Methods
This is the data of the quadrature values of the generated states which are obtained by postprocessing of the homodyne detector data collected via oscilloscope.
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