The role of auxiliary states in state discrimination with linear optical evices
arXiv:quant-ph/0106041 · doi:10.1080/09500340110098370
Abstract
The role of auxiliary photons in the problem of identifying a state secretly chosen from a given set of L-photon states is analyzed. It is shown that auxiliary photons do not increase the ability to discriminate such states by means of a global measurement using only optical linear elements, conditional transformation and auxiliary photons.
5 pages. 1 figure. RevTex document