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1. Quantum displacement receiver for M-ary phase-shift-keyed coherent states

Author

Shuro Izumi, Mikio Fujiwara, Antonio Assalini, Masahiro Takeoka, Masahide Sasaki, Nicola Dalla Pozza, and Kazuhiro Ema

Subjects
Physics, Quantum network, Quantum error correction, Quantum limit, Electronic engineering, Quantum operation, Quantum algorithm, Quantum channel, Quantum capacity, Quantum information, Topology
Abstract

We propose quantum receivers for 3- and 4-ary phase-shift-keyed (PSK) coherent state signals to overcome the standard quantum limit (SQL). Our receiver, consisting of a displacement operation and on-off detectors with or without feedforward, provides an error probability performance beyond the SQL. We show feedforward operations can tolerate the requirement for the detector specifications.

Published
2014

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