Dissipative squeezed vacuum in non-equilibrium thermo field dynamics

Kyo Yoshida, Tsuyoshi Hayashi, Sachiko Kitajima and Toshihico Arimitsu

Physica A: Statistical Mechanics and its Applications, 2010, vol. 389, issue 4, 705-722

Abstract: Degenerate parametric amplification accompanied by dissipation is analyzed within the canonical operator formalism for quantum dissipative systems named non-equilibrium thermo field dynamics. The vacuum of the system is subject to both dissipation and breaking of phase symmetry due to squeezing. The annihilation-creation operators for the vacuum are derived and the structure of the vacuum is examined. The effects of dissipation on squeezing and uncertainty relation are estimated.

Keywords: Non-equilibrium thermo field dynamics; Dissipative quantum systems; Dissipative squeezed vacuum; Quantum optics (search for similar items in EconPapers)
Date: 2010
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:389:y:2010:i:4:p:705-722

DOI: 10.1016/j.physa.2009.10.025

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