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Dissipation, dephasing and quantum Darwinism in qubit systems with random unitary interactions

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Abstract

We investigate the influence of dissipation and decoherence on quantum Darwinism by generalizing Zurek’s original qubit model of decoherence and the establishment of pointer states [W.H. Zurek, Nat. Phys. 5, 181 (2009); see also arXiv: quant-ph/0707.2832v1, pp. 14-19.]. Our model allows for repeated multiple qubit-qubit couplings between system and environment which are described by randomly applied two-qubit quantum operations inducing entanglement, dissipation and dephasing. The resulting stationary qubit states of system and environment are investigated. They exhibit the intricate influence of entanglement generation, dissipation and dephasing on this characteristic quantum phenomenon.

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Authors and Affiliations

  1. Institut fúr Angewandte Physik, Technische Universitát Darmstadt, 64289, Darmstadt, Germany

    Nenad Balaneskovic & Marc Mendler

Authors
  1. Nenad Balaneskovic
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  2. Marc Mendler
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Correspondence to Nenad Balaneskovic.

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Balaneskovic, N., Mendler, M. Dissipation, dephasing and quantum Darwinism in qubit systems with random unitary interactions. Eur. Phys. J. D 70, 177 (2016). https://doi.org/10.1140/epjd/e2016-70174-9

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  • DOI: https://doi.org/10.1140/epjd/e2016-70174-9

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