Computation in Sofic Quantum Dynamical Systems

  • Authors:
  • Karoline Wiesner;James P. Crutchfield

  • Affiliations:
  • Center for Computational Science & Engineering and Physics Department, University of California Davis, Davis, USA 95616;Center for Computational Science & Engineering and Physics Department, University of California Davis, Davis, USA 95616

  • Venue:
  • Natural Computing: an international journal
  • Year:
  • 2010

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Abstract

We analyze how measured quantum dynamical systems store and process information, introducing sofic quantum dynamical systems. Using recently introduced information-theoretic measures for quantum processes, we quantify their information storage and processing in terms of entropy rate and excess entropy, giving closed-form expressions where possible. To illustrate the impact of measurement on information storage in quantum processes, we analyze two spin-1 sofic quantum systems that differ only in how they are measured.