Phys. Rev. A 66, 064302 (2002) [4 pages]Linear optical implementation of a single-mode quantum filter and generation of multiphoton polarization entangled statesReceived 2 July 2002; published 26 December 2002 We propose a scheme to implement a single-mode quantum filter, which selectively eliminates the one-photon state in a quantum state α|0〉+β|1〉+γ|2〉. The vacuum state and the two-photon state are transmitted without any change. This scheme requires single-photon sources, linear optical elements, and photon detectors. Furthermore, we demonstrate how this filter can be used to realize a two-qubit projective measurement and to generate multiphoton polarization entangled states. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.66.064302
DOI:
10.1103/PhysRevA.66.064302
PACS:
03.67.-a, 03.65.Ud
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