Performance gain of displacement receiver with optimized prior probability

M. Fujiwara, S. Izumi, M. Takeoka, M. Sasaki

研究成果: Article査読

3 被引用数 (Scopus)

抄録

We numerically study the performance of the displacement based quantum receiver for the discrimination of weak 3- and 4-phase-shift keyed (PSK) coherent state signals. We show that due to the nontrivial asymmetry of the receiver structure, optimization of the prior probability increases the mutual information and achieves sub-shot-noise limit discrimination. Moreover, we estimate the cutoff rate for a 4-PSK signal and confirm that the prior probability optimization shortens the code length for a given decoding error criterion. Such consideration for the asymmetric channel matrix is essential in a study of the compassable quantum receiver.

本文言語English
ページ(範囲)2723-2728
ページ数6
ジャーナルPhysics Letters, Section A: General, Atomic and Solid State Physics
377
39
DOI
出版ステータスPublished - 2013 11月 22
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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