Phys. Rev. A 68, 052315 (2003) [4 pages]Creation of maximally entangled photon-number states using optical fiber multiportsReceived 1 May 2003; published 21 November 2003 We theoretically demonstrate a method for producing the maximally path-entangled state (1/√2)(|N,0〉+exp[iNφ]|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. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.68.052315
DOI:
10.1103/PhysRevA.68.052315
PACS:
03.67.Mn, 42.50.Dv, 42.50.St, 06.30.Bp
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