Entanglement and parametric resonance in driven quantum systems

V. M. Bastidas, J. H. Reina, C. Emary, and T. Brandes
Phys. Rev. A 81, 012316 – Published 21 January 2010

Abstract

We study the relationship between entanglement and parametric resonance in a system of two coupled time-dependent oscillators. As a measure of bipartite entanglement, we calculate the linear entropy for the reduced density operator, from which we study the entanglement dynamics. In particular, we find that the bipartite entanglement increases in time up to a maximal mixing scenario, when the set of auxiliary dynamical parameters are under parametric resonance. Moreover, we obtain a closed relationship between the correlations in the ground state, the localization of the Wigner function in phase space, and the localization of the wave function of the total system.

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  • Received 14 October 2009

DOI:https://doi.org/10.1103/PhysRevA.81.012316

©2010 American Physical Society

Authors & Affiliations

V. M. Bastidas1,*, J. H. Reina2, C. Emary1, and T. Brandes1

  • 1Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstraße 36, D-10623 Berlin, Germany
  • 2Universidad del Valle, Departamento de Física, A.A. 25360, Cali, Colombia

  • *victor@itp.physik.tu-berlin.de

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Vol. 81, Iss. 1 — January 2010

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