Expansion of matter waves in static and driven periodic potentials

Details Expansion of matter waves in static and driven periodic potentials Expansion of matter waves in static and driven periodic potentials

2010-08-04

arxiv.org/abs/1008.0708v1

Phys. Rev. A 82, 035601 (2010)

Physics

Condensed Matter

Quantum Gases

4 pages, 3 eps figures

Scientific paper

10.1103/PhysRevA.82.035601

We study the non-equilibrium dynamics of cold atoms held in an optical lattice potential. The expansion of an initially confined atom cloud occurs in two phases: an initial quadratic expansion followed by a ballistic behaviour at long times. Accounting for this gives a good description of recent experimental results, and provides a robust method to extract the effective intersite tunneling from time-of-flight measurements.

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