Creation of maximally entangled photon-number states using optical fiber multiports

Details Creation of maximally entangled photon-number states using optical fiber multiports Creation of maximally entangled photon-number states using optical fiber multiports

2003-04-20

arxiv.org/abs/quant-ph/0304135v3

Phys.Rev.A68:052315,2003

Physics

Quantum Physics

4 pages, 1 figure. REVTeX4. Replaced with published version

Scientific paper

10.1103/PhysRevA.68.052315

We theoretically demonstrate a method for producing the maximally path-entangled state (1/Sqrt[2]) (|N,0> + exp[iN phi] |0,N>) using intensity-symmetric multiport beamsplitters, 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.

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