Quantum Optical State Comparison Amplifier

Electra Eleftheriadou, Steve Barnett, John Jeffers

Research output: Contribution to journalLetter

15 Citations (Scopus)

Abstract

It is a fundamental principle of quantum theory that an unknown state cannot be copied or, as a consequence, an unknown optical signal cannot be amplified deterministically and perfectly. Here we describe a protocol that provides nondeterministic quantum optical amplification in the coherent state basis with high gain and high fidelity and which does not use quantum resources. The scheme is based on two mature quantum optical technologies: coherent state comparison and photon subtraction. The method compares favorably with all previous nondeterministic amplifiers in terms of fidelity and success probability.
Original languageEnglish
Article number213601
JournalPhysical Review Letters
Volume111
Issue number21
DOIs
Publication statusPublished - 19 Nov 2013

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amplifiers
high gain
subtraction
quantum theory
optical communication
resources
photons

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Eleftheriadou, Electra ; Barnett, Steve ; Jeffers, John. / Quantum Optical State Comparison Amplifier. In: Physical Review Letters. 2013 ; Vol. 111, No. 21.
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Quantum Optical State Comparison Amplifier. / Eleftheriadou, Electra; Barnett, Steve; Jeffers, John.

In: Physical Review Letters, Vol. 111, No. 21, 213601, 19.11.2013.

Research output: Contribution to journalLetter

TY - JOUR

T1 - Quantum Optical State Comparison Amplifier

AU - Eleftheriadou, Electra

AU - Barnett, Steve

AU - Jeffers, John

PY - 2013/11/19

Y1 - 2013/11/19

N2 - It is a fundamental principle of quantum theory that an unknown state cannot be copied or, as a consequence, an unknown optical signal cannot be amplified deterministically and perfectly. Here we describe a protocol that provides nondeterministic quantum optical amplification in the coherent state basis with high gain and high fidelity and which does not use quantum resources. The scheme is based on two mature quantum optical technologies: coherent state comparison and photon subtraction. The method compares favorably with all previous nondeterministic amplifiers in terms of fidelity and success probability.

AB - It is a fundamental principle of quantum theory that an unknown state cannot be copied or, as a consequence, an unknown optical signal cannot be amplified deterministically and perfectly. Here we describe a protocol that provides nondeterministic quantum optical amplification in the coherent state basis with high gain and high fidelity and which does not use quantum resources. The scheme is based on two mature quantum optical technologies: coherent state comparison and photon subtraction. The method compares favorably with all previous nondeterministic amplifiers in terms of fidelity and success probability.

UR - http://prl.aps.org/abstract/PRL/v111/i21/e213601

U2 - 10.1103/PhysRevLett.111.213601

DO - 10.1103/PhysRevLett.111.213601

M3 - Letter

VL - 111

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

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M1 - 213601

ER -