Demonstration of Near-Optimal Discrimination  of Optical Coherent  States

Christoffer Wittmann; Masahiro Takeoka; Katiuscia N Cassemiro; Masahide Sasaki; Gerd Leuchs; Ulrik Lund Andersen

doi:10.1103/PhysRevLett.101.210501

Demonstration of Near-Optimal Discrimination of Optical Coherent States

Christoffer Wittmann, Masahiro Takeoka, Katiuscia N Cassemiro, Masahide Sasaki, Gerd Leuchs, Ulrik Lund Andersen

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Abstract

The optimal discrimination of nonorthogonal quantum states with minimum error probability is a fundamental task in quantum measurement theory as well as an important primitive in optical communication. In this work, we propose and experimentally realize a new and simple quantum measurement strategy capable of discriminating two coherent states with smaller error probabilities than can be obtained using the standard measurement devices: the Kennedy receiver and the homodyne receiver.

Original language	English
Journal	Physical Review Letters
Volume	101
Issue number	21
Pages (from-to)	210501
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.101.210501
Publication status	Published - 2008

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