Quench dynamics and non equilibrium phase diagram of the Bose-Hubbard model

Details Quench dynamics and non equilibrium phase diagram of the Bose-Hubbard model Quench dynamics and non equilibrium phase diagram of the Bose-Hubbard model

2006-07-10

arxiv.org/abs/cond-mat/0607235v2

Phys. Rev. Lett. 98, 180601 (2007)

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevLett.98.180601

We investigate the time evolution of correlations in the Bose-Hubbard model following a quench from the superfluid to the Mott insulating phase. For large values of the final interaction strength the system approaches a distinctly non-equilibrium steady state that bears strong memory of the initial conditions. In contrast, when the final interaction strength is comparable to the hopping, the correlations are rather well approximated by those at thermal equilibrium. The existence of two distinct non-equilibrium regimes is surprising given the non-integrability of the Bose-Hubbard model. We relate this phenomena to the role of quasi-particle interactions in the Mott insulating state.

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