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.
@article{arxiv.quant-ph/0304135,
title = {Creation of maximally entangled photon-number states using optical fiber multiports},
author = {G. J. Pryde and A. G. White},
journal= {arXiv preprint arXiv:quant-ph/0304135},
year = {2008}
}
Comments
4 pages, 1 figure. REVTeX4. Replaced with published version