Photon-number superselection and the entangled coherent-state representation

Barry C. Sanders, Stephen D. Bartlett, Terry Rudolph, Peter L. Knight

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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 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.
Original languageEnglish
Pages (from-to)042329-1-042329-9
Number of pages9
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume68
Issue number4
DOIs
Publication statusPublished - 2003

Bibliographical note

Sanders BC, Bartlett SD, Rudolph T and Knight PL, Physical review. A, Atomic, molecular, and optical physics, 68(4), 042329, 2003. Copyright 2003 by the American Physical Society. The original article can be found at http://dx.doi.org/10.1103/PhysRevA.68.042329

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