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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)
21 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 languageEnglish
Title of host publicationQuantum Technologies 2018
EditorsJürgen Stuhler, Andrew J. Shields, Miles J. Padgett
PublisherSPIE
ISBN (Electronic)9781510618756
ISBN (Print)9781510618749
DOIs
Publication statusPublished - 21 May 2018
EventQuantum Technologies 2018 - Strasbourg, France
Duration: 23 Apr 201825 Apr 2018
https://spie.org/EPE/conferencedetails/quantum-technologies?SSO=1

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume10674
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceQuantum Technologies 2018
CountryFrance
CityStrasbourg
Period23/04/1825/04/18
Internet address

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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  • Cite this

    Mazzarella, L., Donaldson, R. J., Collins, R. J., Zanforlin, U., Tatsi, G., Buller, G. S., & Jeffers, J. (2018). Quantum state comparison amplifier with feedforward state correction. In J. Stuhler, A. J. Shields, & M. J. Padgett (Eds.), Quantum Technologies 2018 [106741D] (Proceedings of SPIE; Vol. 10674). SPIE. https://doi.org/10.1117/12.2307818