Heating rates for an atom in a far-detuned optical lattice

Details Heating rates for an atom in a far-detuned optical lattice Heating rates for an atom in a far-detuned optical lattice

2010-02-26

arxiv.org/abs/1002.5018v1

Physical Review A: Atomic, Molecular and Optical Physics 82 (2010) 013615

Physics

Condensed Matter

Quantum Gases

11 pages, 3 figures, 1 table

Scientific paper

We calculate single atom heating rates in a far detuned optical lattice, in connection with recent experiments. We first derive a master equation, including a realistic atomic internal structure and a quantum treatment of the atomic motion in the lattice. The experimental feature that optical lattices are obtained by superimposing laser standing waves of different frequencies is also included, which leads to a micromotional correction to the light shift that we evaluate. We then calculate, and compare to experimental results, two heating rates, the "total" heating rate (corresponding to the increase of the total mechanical energy of the atom in the lattice), and the ground bande heating rate (corresponding to the increase of energy within the ground energy band of the lattice).

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