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APS

Time-dependent perturbation theory of a Bose-Einstein condensate in a tilted optical lattice

Yi Zheng, Marijan Koštrun, Juha Javanainen

Published May 1, 2004• 0 citations
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Bloch oscillations of Bose-Einstein condensates realize sensitive matter-wave interferometers. We investigate the dynamics and stability of bright-soliton wave packets in one-dimensional tilted optical lattices with a modulated mean-field interaction g(t)g(t)g(t). By means of a time-reversal argument, we prove the stability of Bloch oscillations of breathing solitons that would be quasistatically unstable. Floquet theory shows that these breathing solitons can be more stable against certain experimental perturbations than rigid solitons or even noninteracting wave packets.