Classical interpretation of dynamics of ultracold atoms in the titled optical lattice

Abstract

Abstract In this paper, we study the dynamics of ultracold 87Rb under the influence of tilted optical lattice via Bloch oscillation in the single-band regime. By simulating the intraband dynamics of wavepacket in position and momentum spaces, the dependences of amplitude and period of the oscillation on tilted coefficient and lattice height are shown and compared with classical theory under tight-binding approximation. We also verify the limit of the single-band approximation where the Landau-Zener transition is neglected.