4.8 Article

Damping of Bloch Oscillations in the Hubbard Model

期刊

PHYSICAL REVIEW LETTERS
卷 107, 期 18, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.186406

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  1. Swiss National Science Foundation [PP0022-118866]
  2. Swiss National Science Foundation (SNF) [PP0022_118866] Funding Source: Swiss National Science Foundation (SNF)

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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.

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