Creation of maximally entangled photon-number states using optical fiber multiports
Abstract
We theoretically demonstrate a method for producing the maximally path-entangled state [Formula Presented] 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.
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Physical Review A - Atomic, Molecular, and Optical Physics