Exploring local quantum many-body relaxation by atoms in optical superlattices

Details Exploring local quantum many-body relaxation by atoms in optical superlattices Exploring local quantum many-body relaxation by atoms in optical superlattices

2008-05-07

arxiv.org/abs/0805.0798v2

Phys. Rev. Lett. 101, 063001 (2008)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 figures, version to published in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.101.063001

We establish a setting - atoms in optical superlattices with period 2 - in which one can experimentally probe signatures of the process of local relaxation and apparent thermalization in non-equilibrium dynamics without the need of addressing single sites. This opens up a way to explore the convergence of subsystems to maximum entropy states in quenched quantum many-body systems with present technology. Remarkably, the emergence of thermal states does not follow from a coupling to an environment, but is a result of the complex non-equilibrium dynamics in closed systems. We explore ways of measuring the relevant signatures of thermalization in this analogue quantum simulation of a relaxation process, exploiting the possibilities offered by optical superlattices.

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