How to characterize the dynamics of cold atoms in non dissipative optical lattices?

Details How to characterize the dynamics of cold atoms in non dissipative optical lattices? How to characterize the dynamics of cold atoms in non dissipative optical lattices?

2009-06-11

arxiv.org/abs/0906.2121v2

Physics

Atomic Physics

Scientific paper

We examine here the classical dynamics of cold atoms in square optical lattices, i.e. lattices obtained with two orthogonal stationary plane waves. Contrary to much of the past studies in this domain, the potential is here time independent and non dissipative. We show that, as a function of the experimental parameters, very different behaviors are obtained, both for the dynamics of atoms trapped inside individual sites, and for atoms travelling between sites: inside the sites, chaos may be a main regime or, on the contrary, may be negligible; outside the sites, chaos sometimes coexists with other regimes. We discuss what are the consequences of these differences on the macroscopic behavior of the atoms in the lattice, and we propose experimental measurements able to characterize these dynamics and to distinguish between the different cases.

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