Criteria for dynamically stable decoherence-free subspaces and incoherently generated coherences

Raisa I. Karasik, Karl-Peter Marzlin, Barry C. Sanders, and K. Birgitta Whaley
Phys. Rev. A 77, 052301 – Published 1 May 2008

Abstract

We present a detailed analysis of decoherence free subspaces and develop a rigorous theory that provides necessary and sufficient conditions for dynamically stable decoherence free subspaces. This allows us to identify a special class of decoherence free states which rely on incoherent generation of coherences. We provide examples of physical systems that support such states. Our approach employs Markovian master equations and applies primarily to finite-dimensional quantum systems.

  • Received 16 November 2007

DOI:https://doi.org/10.1103/PhysRevA.77.052301

©2008 American Physical Society

Authors & Affiliations

Raisa I. Karasik1,2,3, Karl-Peter Marzlin3, Barry C. Sanders3,4, and K. Birgitta Whaley1,2

  • 1Applied Science and Technology, University of California, Berkeley, California 94720, USA
  • 2Berkeley Quantum Information Center and Department of Chemistry, University of California, Berkeley, California 94720, USA
  • 3Institute for Quantum Information Science, University of Calgary, Calgary, Alberta T2N 1N4, Canada
  • 4Centre for Quantum Computer Technology, Macquarie University, Sydney, New South Wales 2109, Australia

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Issue

Vol. 77, Iss. 5 — May 2008

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