Photon-number superselection and the entangled coherent-state representation

Details Photon-number superselection and the entangled coherent-state representation Photon-number superselection and the entangled coherent-state representation

2003-06-11

arxiv.org/abs/quant-ph/0306076v2

Phys. Rev. A 68, 042329 (2003)

Physics

Quantum Physics

9 pages, 3 figures, published version

Scientific paper

10.1103/PhysRevA.68.042329

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.

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