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Dynamical Casimir effect in dissipative media: When is the final state nonseparable?

Xavier Busch* and Renaud Parentani†

  • Laboratoire de Physique Théorique, CNRS UMR 8627, Bâtiment 210, Université Paris-Sud 11, 91405 Orsay CEDEX, France

  • *xavier.busch@th.u-psud.fr
  • †renaud.parentani@th.u-psud.fr
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Phys. Rev. D 88, 045023 – Published 27 August, 2013

DOI: https://doi.org/10.1103/PhysRevD.88.045023

Abstract

We study the consequences of dissipation in homogeneous media when the system is subject to a sudden change, thereby producing pairs of correlated quasiparticles with opposite momenta. We compute both the modifications of the spectrum and those of the correlations. In particular, we compute the final coherence level and identify the regimes where the state is nonseparable. To isolate the role of dissipation, we first consider dispersive media and study the competition between the intensity of the jump which induces some coherence, and the temperature which reduces it. The contributions of stimulated and spontaneous emission are clearly identified. We then study how dissipation modifies this competition.

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Article Text

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Phys. Rev. D 88, 045023– Published 27 August, 2013
  • Received 4 June 2013

© 2013 American Physical Society

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