Nonlocal Memory Effects in the Dynamics of Open Quantum Systems

Elsi-Mari Laine, Heinz-Peter Breuer, Jyrki Piilo, Chuan-Feng Li, and Guang-Can Guo
Phys. Rev. Lett. 108, 210402 – Published 22 May 2012; Erratum Phys. Rev. Lett. 111, 229901 (2013)

Abstract

We explore the possibility to generate nonlocal dynamical maps of an open quantum system through local system-environment interactions. Employing a generic decoherence process induced by a local interaction Hamiltonian, we show that initial correlations in a composite environment can lead to nonlocal open system dynamics which exhibit strong memory effects, although the local dynamics is Markovian. In a model of two entangled photons interacting with two dephasing environments, we find a direct connection between the degree of memory effects and the amount of correlation in the initial environmental state. The results demonstrate that, contrary to conventional wisdom, enlarging an open system can change the dynamics from Markovian to non-Markovian.

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  • Received 18 November 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.210402

© 2012 American Physical Society

Erratum

Erratum: Nonlocal Memory Effects in the Dynamics of Open Quantum Systems [Phys. Rev. Lett. 108, 210402 (2012)]

Elsi-Mari Laine, Heinz-Peter Breuer, Jyrki Piilo, Chuan-Feng Li, and Guang-Can Guo
Phys. Rev. Lett. 111, 229901 (2013)

Authors & Affiliations

Elsi-Mari Laine1, Heinz-Peter Breuer2,*, Jyrki Piilo1,†, Chuan-Feng Li3,‡, and Guang-Can Guo3

  • 1Turku Centre for Quantum Physics, Department of Physics and Astronomy, University of Turku, FI-20014 Turun yliopisto, Finland
  • 2Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, D-79104 Freiburg, Germany
  • 3Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei 230026, China

  • *breuer@physik.uni-freiburg.de
  • jyrki.piilo@utu.fi
  • cfli@ustc.edu.cn

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Issue

Vol. 108, Iss. 21 — 25 May 2012

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