Dynamics and stability of Bose-Einstein solitons in tilted optical lattices

Details Dynamics and stability of Bose-Einstein solitons in tilted optical lattices Dynamics and stability of Bose-Einstein solitons in tilted optical lattices

2009-11-30

arxiv.org/abs/0911.5633v2

Phys. Rev. A 81 051607(R) (2010)

Physics

Condensed Matter

Quantum Gases

final, published version

Scientific paper

10.1103/PhysRevA.81.051607

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 $g(t)$. 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 non-interacting wave packets.

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