Low-acceleration instability of a Bose-Einstein condensate in an optical lattice.
We study a Bose-Einstein condensate in a one-dimensional accelerated optical lattice using the mean-field version of the Bose-Hubbard model. Reminiscent of recent experiments [M. Cristiani et al., Opt. Express 12, 4 (2004)], we find a new type of an instability in this system that occurs in the limit when the acceleration is small.
Zheng
Yi
Y
Department of Physics, University of Connecticut, Storrs, CT 06269-3046, USA.
Kostrun
Marijan
M
Javanainen
Juha
J