Details

Autor(en) / Beteiligte

• Li, Linshu
• Zou, Chang-Ling
• Albert, Victor V
• Muralidharan, Sreraman
• Girvin, S M
• Jiang, Liang

Titel

Cat Codes with Optimal Decoherence Suppression for a Lossy Bosonic Channel

Ist Teil von

• Physical review letters, 2017-07, Vol.119 (3), p.030502-030502, Article 030502

Ort / Verlag

United States

Erscheinungsjahr

2017

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We investigate cat codes that can correct multiple excitation losses and identify two types of logical errors: bit-flip errors due to excessive excitation loss and dephasing errors due to quantum backaction from the environment. We show that selected choices of logical subspace and coherent amplitude significantly reduce dephasing errors. The trade-off between the two major errors enables optimized performance of cat codes in terms of minimized decoherence. With high coupling efficiency, we show that one-way quantum repeaters with cat codes feature a boosted secure communication rate per mode when compared to conventional encoding schemes, showcasing the promising potential of quantum information processing with continuous variable quantum codes.