Pulsating instability of a Bose-Einstein condensate in an optical lattice

Details Pulsating instability of a Bose-Einstein condensate in an optical lattice Pulsating instability of a Bose-Einstein condensate in an optical lattice

2008-01-31

arxiv.org/abs/0801.4964v1

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevLett.101.070406

We find numerically that in the limit of weak atom-atom interactions a Bose-Einstein condensate in an optical lattice may develop a pulsating dynamical instability in which the atoms nearly periodically form a peak in the occupation numbers of the lattice sites, and then return to the unstable initial state. Multiple peaks behaving similarly may also occur. Simple arguments show that the pulsating instability is a remnant of integrability, and give a handle on the relevant physical scales.

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