Optical amplifier-powered quantum optical amplification

Jeffers, John (2011) Optical amplifier-powered quantum optical amplification. Physical Review A, 83 (5). 053818. ISSN 1094-1622

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I show that an optical amplifier, when combined with photon subtraction, can be used for quantum state amplification, adding noise at a level below the standard minimum. The device could be used to significantly decrease the probability of incorrectly identifying coherent states chosen from a finite set.