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arXiv:1009.5465 · Physical Review A

Dynamical instability and loss of p -band bosons in optical lattices

J.-P. Martikainen

Published Jan 18, 2011• 16 citations
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Abstract

We study how the bosonic atoms on the excited $p$ band of an optical lattice are coupled to the lowest $s$ band and the second excited $d$ band. We find that in some parameter regimes, the atom-atom interactions can cause a dynamical instability of the $p$-band atoms toward decay to the $s$ and $d$ bands. Furthermore, even when dynamical instability is not expected $s$ and $d$ bands can become substantially populated. We also find that the stability properties of the excited bands can be improved in superlattices.

DOI
10.1103/physreva.83.013610

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