Quantum phase space distributions in thermofield dynamics

Abstract

It is shown that the the quantum phase space distributions corresponding to a density operator $\rho$ can be expressed, in thermofield dynamics, as overlaps between the state $\mid \rho >$ 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.

17 pages, revtex, no figures. number of pages were incorrectly stated as 3 instead of 17. No other corrections

References in corpus (1)

• Direct Probing of Quantum Phase Space by Photon Counting

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