Superfluid Bloch dynamics in an incommensurate lattice

Abstract

We investigate the interplay of disorder and interactions in the accelerated transport of a Bose-Einstein condensate through an incommensurate optical lattice. We show that interactions can effectively cancel the damping of Bloch oscillations due to the disordered potential and we provide a simple model to qualitatively capture this screening effect. We find that the characteristic interaction energy, above which interactions and disorder cooperate to enhance, rather than reduce, the damping of Bloch oscillations, coincides with the average disorder depth. This is consistent with results of a mean-field simulation.

9 pages, 3 figures

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Cited by in corpus (7)

• Dimers and discrete breathers in Bose-Einstein condensates in a quasi-periodic potential
• Bloch-Landau-Zener oscillations in a quasi-periodic potential
• Quantum simulation of conductivity plateaux and fractional quantum Hall effect using ultracold atoms
• Coherence Times of Bose-Einstein Condensates beyond the Shot-Noise Limit via Superfluid Shielding
• Formation of nonlinear modes in one-dimensional quasiperiodic lattices with a mobility edge
• Towards the complete description of stationary states of a Bose-Einstein condensate in a one-dimensional quasiperiodic lattice: A coding approach
• Bloch-Landau-Zener Oscillations in Moiré Lattices