Non-Markoffian effects of a simple nonlinear bath

Gassmann, H. and Marquardt, F. and Bruder, C.. (2002) Non-Markoffian effects of a simple nonlinear bath. Physical review. E, Statistical, nonlinear and soft matter physics, Vol. 66, H. 4, Part 1 , 041111, 8 S..

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Official URL: http://edoc.unibas.ch/dok/A5252849

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We analyze a model of a nonlinear bath consisting of a single two-level system coupled to a linear bath (a classical noise force in the limit considered here). This allows us to study the effects of a nonlinear, non-Markoffian bath in a particularly simple situation. We analyze the effects of this bath onto the dynamics of a spin by calculating the decay of the equilibrium correlator of the z-component of the spin. The exact results are compared with those obtained using three commonly used approximations: a Markoffian master equation for the spin dynamics, a weak-coupling approximation, and the substitution of a linear bath for the original nonlinear bath.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Bruder)
UniBasel Contributors:Bruder, Christoph
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Institute of Physicas
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:26
Deposited On:22 Mar 2012 13:52

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