Quantum state comparison amplifier with feedforward state correction

L. Mazzarella; R. J. Donaldson; R. J. Collins; U. Zanforlin; G. Tatsi; G. S. Buller; J. Jeffers

doi:10.1117/12.2307818

Quantum state comparison amplifier with feedforward state correction

L. Mazzarella^*, R. J. Donaldson, R. J. Collins, U. Zanforlin, G. Tatsi, G. S. Buller, J. Jeffers

^*Corresponding author for this work

Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

3 Citations (Scopus)

16 Downloads (Pure)

Abstract

Quantum mechanics imposes stringent constraints on the amplification of a quantum signal. Deterministic amplification of an unknown quantum state always implies the addition of a minimal amount of noise. Linear and noiseless amplification is allowed in principle provided that it only works probabilistically. Here we present a probabilistic amplifier that combines two quantum state comparison amplifiers (SCAMP) together with a feed-forward state correction strategy. Our system outperforms the unambiguous state discrimination (USD) measure-and-resend based amplifier in terms of the success probability-fidelity product and requires a more complex experimental setting.

Original language	English
Title of host publication	Quantum Technologies 2018
Editors	Jürgen Stuhler, Andrew J. Shields, Miles J. Padgett
Place of Publication	Bellingham, Washington
Number of pages	10
Volume	10674
ISBN (Electronic)	9781510618749
DOIs	https://doi.org/10.1117/12.2307818
Publication status	Published - 21 May 2018
Event	Quantum Technologies 2018 - Strasbourg, France Duration: 23 Apr 2018 → 25 Apr 2018

Conference

Conference	Quantum Technologies 2018
Country/Territory	France
City	Strasbourg
Period	23/04/18 → 25/04/18

Funding

The work was supported by the UK Quantum Technology Hub for Quantum Communications Technologies funded by UK Engineering and Physical Sciences Research Council (EP/M013472/1).

Keywords

coherent states
optical amplifier
probabilistic amplifier
quantum amplifier
quantum technologies
state amplification
state comparison

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10.1117/12.2307818

Mazzarella-etal-SPIE-2018-Quantum-state-comparison-amplifier-with-feedforward-state-correctionFinal published version, 847 KB

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title = "Quantum state comparison amplifier with feedforward state correction",

abstract = "Quantum mechanics imposes stringent constraints on the amplification of a quantum signal. Deterministic amplification of an unknown quantum state always implies the addition of a minimal amount of noise. Linear and noiseless amplification is allowed in principle provided that it only works probabilistically. Here we present a probabilistic amplifier that combines two quantum state comparison amplifiers (SCAMP) together with a feed-forward state correction strategy. Our system outperforms the unambiguous state discrimination (USD) measure-and-resend based amplifier in terms of the success probability-fidelity product and requires a more complex experimental setting.",

keywords = "coherent states, optical amplifier, probabilistic amplifier, quantum amplifier, quantum technologies, state amplification, state comparison",

author = "L. Mazzarella and Donaldson, {R. J.} and Collins, {R. J.} and U. Zanforlin and G. Tatsi and Buller, {G. S.} and J. Jeffers",

year = "2018",

month = may,

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language = "English",

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editor = "J{\"u}rgen Stuhler and Shields, {Andrew J.} and Padgett, {Miles J.}",

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Mazzarella, L, Donaldson, RJ, Collins, RJ, Zanforlin, U, Tatsi, G, Buller, GS & Jeffers, J 2018, Quantum state comparison amplifier with feedforward state correction. in J Stuhler, AJ Shields & MJ Padgett (eds), Quantum Technologies 2018. vol. 10674, 106741D, Bellingham, Washington, Quantum Technologies 2018, Strasbourg, France, 23/04/18. https://doi.org/10.1117/12.2307818

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T1 - Quantum state comparison amplifier with feedforward state correction

AU - Mazzarella, L.

AU - Donaldson, R. J.

AU - Collins, R. J.

AU - Zanforlin, U.

AU - Tatsi, G.

AU - Buller, G. S.

AU - Jeffers, J.

PY - 2018/5/21

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N2 - Quantum mechanics imposes stringent constraints on the amplification of a quantum signal. Deterministic amplification of an unknown quantum state always implies the addition of a minimal amount of noise. Linear and noiseless amplification is allowed in principle provided that it only works probabilistically. Here we present a probabilistic amplifier that combines two quantum state comparison amplifiers (SCAMP) together with a feed-forward state correction strategy. Our system outperforms the unambiguous state discrimination (USD) measure-and-resend based amplifier in terms of the success probability-fidelity product and requires a more complex experimental setting.

AB - Quantum mechanics imposes stringent constraints on the amplification of a quantum signal. Deterministic amplification of an unknown quantum state always implies the addition of a minimal amount of noise. Linear and noiseless amplification is allowed in principle provided that it only works probabilistically. Here we present a probabilistic amplifier that combines two quantum state comparison amplifiers (SCAMP) together with a feed-forward state correction strategy. Our system outperforms the unambiguous state discrimination (USD) measure-and-resend based amplifier in terms of the success probability-fidelity product and requires a more complex experimental setting.

KW - coherent states

KW - optical amplifier

KW - probabilistic amplifier

KW - quantum amplifier

KW - quantum technologies

KW - state amplification

KW - state comparison

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M3 - Conference contribution book

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VL - 10674

BT - Quantum Technologies 2018

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CY - Bellingham, Washington

T2 - Quantum Technologies 2018

Y2 - 23 April 2018 through 25 April 2018

ER -

Quantum state comparison amplifier with feedforward state correction

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Keywords

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