Sabrina Maniscalco
Published 2005-03-14, updated 2006-02-08Version 2
The short time dynamics of a quantum Brownian particle in a harmonic potential is studied in the phase space. An exact non-Markovian analytic approach to calculate the time evolution of the Wigner function is presented. The dynamics of the Wigner function of an initially squeezed state is analyzed. It is shown that virtual exchanges of energy between the particle and the reservoir, characterizing the non-Lindblad short time dynamics where system-reservoir correlations are not negligible, show up in the phase space.
Comments: Minor changes according to referees' suggestions
Journal: J. Opt. B: Quantum Semiclass. Opt. 7, S398 (2005)
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