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arXiv · 1104.5210

Doublon relaxation in the Bose-Hubbard model

A. L. Chudnovskiy·D. M. Gangardt·A. Kamenev
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Abstract

Decay of a high-energy double occupancy state, doublon, in a narrow-band lattice requires creation of a coherent many-particle excitation. This leads to an exponentially long relaxation time of such a state. We show that, if the average occupation number is sufficiently small, the corresponding exponent may be evaluated exactly. To this end we develop the quasiclassical approach to calculation of the high-order tree-level decay amplitudes.

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A. L. Chudnovskiy, D. M. Gangardt, A. Kamenev. 2011-04-27. Doublon relaxation in the Bose-Hubbard model. https://doi.org/10.1103/physrevlett.108.085302

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