Quantum state comparison amplifier with feedforward state correction

L. Mazzarella; Ross J. Donaldson; Robert John Collins; Ugo Zanforlin; G. Tatsi; Gerald Stuart Buller; J. Jeffers

doi:10.1117/12.2307818

Quantum state comparison amplifier with feedforward state correction

L. Mazzarella^*, Ross J. Donaldson, Robert John Collins, Ugo Zanforlin, G. Tatsi, Gerald Stuart Buller, J. Jeffers

^*Corresponding author for this work

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

3 Citations (Scopus)

77 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
Publisher	SPIE
ISBN (Electronic)	9781510618756
ISBN (Print)	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 https://spie.org/EPE/conferencedetails/quantum-technologies?SSO=1

Publication series

Name	Proceedings of SPIE
Publisher	SPIE
Volume	10674
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Quantum Technologies 2018
Country/Territory	France
City	Strasbourg
Period	23/04/18 → 25/04/18
Internet address	https://spie.org/EPE/conferencedetails/quantum-technologies?SSO=1

Keywords

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

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.2307818

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L. Mazzarella; R. J. Donaldson; R. J. Collins; U. Zanforlin; G. Tatsi; G. S. Buller; J. Jeffers, "Quantum state comparison amplifier with feedforward state correction", Proceedings Volume 10674, Quantum Technologies 2018; 106741D (2018). DOI: https://doi.org/10.1117/12.2307818 © 2018 Society of Photo Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, or modification of the contents of the publication are prohibited.
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Cite this

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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",

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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., 106741D, Proceedings of SPIE, vol. 10674, SPIE, Quantum Technologies 2018, Strasbourg, France, 23/04/18. https://doi.org/10.1117/12.2307818

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AU - Donaldson, Ross J.

AU - Collins, Robert John

AU - Zanforlin, Ugo

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AU - Buller, Gerald Stuart

AU - Jeffers, J.

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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

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ER -

Quantum state comparison amplifier with feedforward state correction

Abstract

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Keywords

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