Doublon relaxation in the Bose-Hubbard model

Details Doublon relaxation in the Bose-Hubbard model Doublon relaxation in the Bose-Hubbard model

2011-04-27

arxiv.org/abs/1104.5210v1

Physics

Condensed Matter

Quantum Gases

4 pages, 1 figure

Scientific paper

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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