Quantum state comparison amplifier with feedforward state correction

Mazzarella, L. and Donaldson, R. J. and Collins, R. J. and Zanforlin, U. and Tatsi, G. and Buller, G. S. and Jeffers, J.; Stuhler, Jürgen and Shields, Andrew J. and Padgett, Miles J., eds. (2018) Quantum state comparison amplifier with feedforward state correction. In: Quantum Technologies 2018. SPIE, FRA. ISBN 9781510618749 (https://doi.org/10.1117/12.2307818)

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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.

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• Item metadata

  Item type:	Book Section
  ID code:	67537
  Dates:	Date Event 21 May 2018 Published 26 January 2018 Accepted
  Subjects:	Science > Physics
  Department:	Faculty of Science > Physics
  Depositing user:	Pure Administrator
  Date deposited:	10 Apr 2019 08:18
  Last modified:	08 Apr 2024 13:53
  Related URLs:	Scopus publication Journal or Publication Related item
  URI:	https://strathprints.strath.ac.uk/id/eprint/67537