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Damping of Bloch oscillations in the Hubbard model

Using nonequilibrium dynamical mean-field theory, we study the isolated Hubbard model in a static electric field in the limit of weak interactions. Linear response behavior is established at long times, but only if the interaction exceeds a critical value, below which the system exhibits an ac-type...

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Bibliographic Details
Published in:Physical review letters 2011-10, Vol.107 (18), p.186406-186406, Article 186406
Main Authors: Eckstein, Martin, Werner, Philipp
Format: Article
Language:English
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Summary:Using nonequilibrium dynamical mean-field theory, we study the isolated Hubbard model in a static electric field in the limit of weak interactions. Linear response behavior is established at long times, but only if the interaction exceeds a critical value, below which the system exhibits an ac-type response with Bloch oscillations. The transition from ac to dc response is defined in terms of the universal long-time behavior of the system, which does not depend on the initial condition.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.107.186406