Coherent-state phase concentration by quantum probabilistic amplification

Details Coherent-state phase concentration by quantum probabilistic amplification Coherent-state phase concentration by quantum probabilistic amplification

2009-07-14

arxiv.org/abs/0907.2402v1

Physics

Quantum Physics

Scientific paper

We propose novel coherent-state phase concentration by probabilistic measurement-induced ampli- fication. The amplification scheme uses novel architecture, thermal noise addition (instead of single photon addition) followed by feasible multiple photon subtraction using realistic photon-number resolving detector. It allows to substantially amplify weak coherent states and simultaneously reduce their phase uncertainty, contrary to the deterministic amplifier.

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