Propagating Gottesman-Kitaev-Preskill states encoded in an optical oscillator
DOI10.5281/zenodo.10456980Zenodo10456980MaRDI QIDQ6693088
Dataset published at Zenodo repository.
Atsushi Sakaguchi, Akira Furusawa, Shigehito Miki, Kosuke Fukui, Ryuhoh Ide, Warit Asavanant, Shunya Konno, Radim Filip, Hirotaka Terai, Peter van Loock, Masahiro Yabuno, Hironari Nagayoshi, Fumiya Hanamura, Petr Marek, Fumihiro China, Kan Takase, Mamoru Endo
Publication date: 3 January 2024
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.
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