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- W1997261976 abstract "We consider a quantum system composed of a spatially infinitely extended free Bose gas with a condensate, interacting with a small system (quantum dot) which can trap finitely many Bosons. Due to spontaneous symmetry breaking in the presence of the condensate, the system has many equilibrium states for each fixed temperature. We extend the notion of Return to Equilibrium to systems possessing a multitude of equilibrium states and show in particular that a condensate coupled to a quantum dot has the property of Return to Equilibrium in a weak coupling sense: any local perturbation of an equilibrium state of the coupled system, evolving under the interacting dynamics, converges in the long time limit to an asymptotic state. The latter is, modulo an error term, an equilibrium state which {it depends} in an explicit way on the local perturbation (an effect due to long-range correlations). The error term vanishes in the small coupling limit. We deduce the stability result from properties of structure and regularity of eigenvectors of the generator of the dynamics, called the Liouville operator. Among our technical results is a Virial Theorem for Liouville type operators which has new applications to systems with and without a condensate." @default.
- W1997261976 created "2016-06-24" @default.
- W1997261976 creator A5041335657 @default.
- W1997261976 date "2005-05-04" @default.
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- W1997261976 title "Stability of Equilibria with a Condensate" @default.
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- W1997261976 doi "https://doi.org/10.1007/s00220-005-1352-3" @default.
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