Doublon relaxation in the bose-hubbard model

A. L. Chudnovskiy, D. M. Gangardt, A. Kamenev

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

The decay of a high-energy double occupancy state, doublon, in a narrow-band lattice requires the 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.

Original languageEnglish (US)
Article number085302
JournalPhysical Review Letters
Volume108
Issue number8
DOIs
StatePublished - Feb 24 2012

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