Binary projective measurement via linear optics and photon counting

Masahiro Takeoka, Masahide Sasaki, Norbert Lütkenhaus

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


We investigate the implementation of binary projective measurements with linear optics. This problem can be viewed as a single-shot discrimination of two orthogonal pure quantum states. We show that any two orthogonal states can be perfectly discriminated using only linear optics, photon counting, coherent ancillary states, and feedforward. The statement holds in the asymptotic limit of a large number of these physical resources.

Original languageEnglish
Article number040502
JournalPhysical review letters
Issue number4
Publication statusPublished - 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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