Simple criteria for projective measurements with linear optics

Details Simple criteria for projective measurements with linear optics Simple criteria for projective measurements with linear optics

2003-04-08

arxiv.org/abs/quant-ph/0304057v2

Phys. Rev. A 69, 012302 (2004)

Physics

Quantum Physics

final published version

Scientific paper

10.1103/PhysRevA.69.012302

We derive a set of criteria to decide whether a given projection measurement can be, in principle, exactly implemented solely by means of linear optics. The derivation can be adapted to various detection methods, including photon counting and homodyne detection. These criteria enable one to obtain easily No-Go theorems for the exact distinguishability of orthogonal quantum states with linear optics including the use of auxiliary photons and conditional dynamics.

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