Optimal Design and Quantum Benchmarks for Coherent State Amplifiers

Optimal Design and Quantum Benchmarks for Coherent State Amplifiers We establish the ultimate quantum limits to the amplification of an unknown coherent state, both in the deterministic and probabilistic case, investigating the realistic scenario where the expected photon number is finite. In addition, we provide the benchmark that experimental realizations have to surpass in order to beat all classical amplification strategies and to demonstrate genuine quantum amplification. Our result guarantees that a successful demonstration is in principle possible for every finite value of the expected photon number. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review Letters American Physical Society (APS)

Optimal Design and Quantum Benchmarks for Coherent State Amplifiers

Physical Review Letters, Volume 110 (21) – May 22, 2013
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Publisher
American Physical Society (APS)
Copyright
© 2013 American Physical Society
ISSN
0031-9007
D.O.I.
10.1103/PhysRevLett.110.213602
Publisher site
See Article on Publisher Site

Abstract

We establish the ultimate quantum limits to the amplification of an unknown coherent state, both in the deterministic and probabilistic case, investigating the realistic scenario where the expected photon number is finite. In addition, we provide the benchmark that experimental realizations have to surpass in order to beat all classical amplification strategies and to demonstrate genuine quantum amplification. Our result guarantees that a successful demonstration is in principle possible for every finite value of the expected photon number.

Journal

Physical Review LettersAmerican Physical Society (APS)

Published: May 22, 2013

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