Journal
PHYSICAL REVIEW A
Volume 66, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.66.064302
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We propose a scheme to implement a single-mode quantum filter, which selectively eliminates the one-photon state in a quantum state alpha\0] + beta\1) + gamma\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.
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