Quantum phase space distributions in thermofield dynamics

Chaturvedi, S. ; Srinivasan, V. ; Agarwal, G. S. (1999) Quantum phase space distributions in thermofield dynamics Journal of Physics A: Mathematical and General, 32 (10). pp. 1909-1918. ISSN 0305-4470

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Official URL: http://iopscience.iop.org/0305-4470/32/10/009

Related URL: http://dx.doi.org/10.1088/0305-4470/32/10/009


It is shown that the quantum phase space distributions corresponding to a density operator ρ can be expressed, in thermofield dynamics, as overlaps between the state |ρ> and `thermal' coherent states. The usefulness of this approach is brought out in the context of a master equation describing a nonlinear oscillator for which exact expressions for the quantum phase distributions for an arbitrary initial condition are derived.

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