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29 March 2024
 
  » arxiv » 0902.2813

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Environment-dependent dissipation in quantum Brownian motion
J. Paavola ; J. Piilo ; K.-A. Suominen ; S. Maniscalco ;
Date 17 Feb 2009
AbstractThe dissipative dynamics of a quantum Brownian particle is studied for different types of environment. We derive analytic results for the time evolution of the mean energy of the system for Ohmic, sub-Ohmic and super-Ohmic environments, without performing the Markovian approximation. Our results allow to establish a direct link between the form of the environmental spectrum and the thermalization dynamics. This in turn leads to a natural explanation of the microscopic physical processes ruling the system time evolution both in the short-time non-Markovian region and in the long-time Markovian one. Our comparative study of thermalization for different environments sheds light on the physical contexts in which non-Markovian dissipation effects are dominant.
Source arXiv, 0902.2813
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