Phys. Rev. A 68, 042329 (2003) [9 pages]Photon-number superselection and the entangled coherent-state representationReceived 11 June 2003; published 24 October 2003 We introduce the entangled coherent-state representation, which provides a powerful technique for efficiently and elegantly describing and analyzing quantum optics sources and detectors while respecting the photon-number superselection rule that is satisfied by all known quantum optics experiments. We apply the entangled coherent-state representation to elucidate and resolve the long-standing puzzles of the coherence of a laser output field, interference between two number states, and dichotomous interpretations of quantum teleportation of coherent states. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.68.042329
DOI:
10.1103/PhysRevA.68.042329
PACS:
03.67.Hk, 42.50.Dv, 42.50.Ct, 03.65.Ud
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