Coherence protection in coupled quantum systems

Cammack, H. M. and Kirton, P. and Stace, T. M. and Eastham, P. R. and Keeling, J. and Lovett, B. W. (2018) Coherence protection in coupled quantum systems. Physical Review A, 97 (2). 022103. ISSN 2469-9926 (https://doi.org/10.1103/PhysRevA.97.022103)

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Abstract

The interaction of a quantum system with its environment causes decoherence, setting a fundamental limit on its suitability for quantum information processing. However, we show that if the system consists of coupled parts with different internal energy scales then the interaction of one part with a thermal bath need not lead to loss of coherence from the other. Remarkably, we find that the protected part can remain coherent for longer when the coupling to the bath becomes stronger or the temperature is raised. Our theory will enable the design of decoherence-resistant hybrid quantum computers.

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• Item metadata

  Item type:	Article
  ID code:	71385
  Dates:	Date Event 2 February 2018 Published 23 January 2018 Accepted
  Subjects:	Science > Physics
  Department:	Faculty of Science > Physics
  Depositing user:	Pure Administrator
  Date deposited:	07 Feb 2020 09:37
  Last modified:	09 Apr 2024 01:18
  Related URLs:	Scopus publication Related item
  URI:	https://strathprints.strath.ac.uk/id/eprint/71385