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Article overview
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Environment-dependent dissipation in quantum Brownian motion | J. Paavola
; J. Piilo
; K.-A. Suominen
; S. Maniscalco
; | Date: |
17 Feb 2009 | Abstract: | The 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 | Services: | Forum | Review | PDF | Favorites |
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