Strong thermalization of a mesoscopic two-component Bose-Hubbard model

Details Strong thermalization of a mesoscopic two-component Bose-Hubbard model Strong thermalization of a mesoscopic two-component Bose-Hubbard model

2011-02-12

arxiv.org/abs/1102.2469v1

Phys. Rev. A 85, 013637 (2012)

Physics

Condensed Matter

Statistical Mechanics

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Scientific paper

10.1103/PhysRevA.85.013637

We study thermalization of a two-component Bose-Hubbard model by exact diagonalization. Initially the two components do not interact and are each at equilibrium but with different temperatures. As the on-site inter-component interaction is turned on, perfect thermalization occurs. Remarkably, not merely those simple "realistic" physical observables thermalize but even the density matrix of the \textit{whole} system---the time-averaged density matrix of the system can be well approximated by that of a canonical ensemble. A conjecture about this fact is put forward.

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