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

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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.
Original languageEnglish
Article number013610
JournalPhysical Review A
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

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