Demonstration of near-optimal discrimination of optical coherent states

Christoffer Wittmann, Masahiro Takeoka, Katiúscia N. Cassemiro, Masahide Sasaki, Gerd Leuchs, Ulrik L. Andersen

Research output: Contribution to journalArticlepeer-review

106 Citations (Scopus)


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 languageEnglish
Article number210501
JournalPhysical review letters
Issue number21
Publication statusPublished - 2008 Nov 17
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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