Phys. Rev. A 65, 030101(R) (2002) [4 pages]Linear optics and projective measurements alone suffice to create large-photon-number path entanglement
We propose a method for preparing maximal path entanglement with a definite photon-number N, larger than two, using projective measurements. In contrast with the previously known schemes, our method uses only linear optics. Specifically, we exhibit a way of generating four-photon, path-entangled states of the form |4,0〉+|0,4〉, using only four beam splitters and two detectors. These states are of major interest as a resource for quantum interferometric sensors as well as for optical quantum lithography and quantum holography. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.65.030101
DOI:
10.1103/PhysRevA.65.030101
PACS:
03.65.Ud, 03.67.-a, 42.50.Dv, 85.40.Hp
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