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American Physical Society, Physical Review A, 4(68), 2003

DOI: 10.1103/physreva.68.042329

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Photon-number superselection and the entangled coherent-state representation

Journal article published in 2003 by Barry C. Sanders, Stephen D. Bartlett ORCID, Terry Rudolph, Peter L. Knight
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This paper is available in a repository.

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Abstract

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 longstanding puzzles of the coherence of a laser output field, interference between two number states, and dichotomous interpretations of quantum teleportation of coherent states. ; Comment: 9 pages, 3 figures, published version