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The role of auxiliary photons in state discrimination with linear optical devices

  • Authors: Carollo, A; Palma, GM
  • Publication year: 2002
  • Type: Articolo in rivista (Articolo in rivista)
  • Key words: Optical linear elements; Photon states, quantum optics
  • OA Link:


The role of auxiliary photons in the problem of identifying a state secretly chosen from a given set of L-photon states is analysed. 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