Creation of maximally entangled photon-number states using optical fiber multiports
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We theoretically demonstrate a method for producing the maximally path-entangled state (1/sqrt)(|N,0>+exp[iNf]|0,N>) using intensity-symmetric multiport beam splitters, single photon inputs, and either photon-counting postselection or conditional measurement. The use of postselection enables successful implementation with non-unit efficiency detectors. We also demonstrate how to make the same state more conveniently by replacing one of the single photon inputs by a coherent state.
Physical Review A (Atomic, Molecular and Optical Physics)
© 2003 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal link for access to the definitive, published version.