Superfluid Bloch dynamics in an incommensurate optical lattice
Superfluid Bloch dynamics in an incommensurate optical lattice
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不相称光学晶格中的超流体布洛赫动力学
DOI：
10.1088/1367-2630/16/6/065011
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发表时间：
2014
影响因子：
3.3
通讯作者：
D. Schneble
中科院分区：
文献类型：
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作者：
J. B. Reeves;B. Gadway;T. Bergeman;I. Danshita;D. Schneble
本文研究了玻色-爱因斯坦凝聚体通过无公度光学晶格的加速输运过程中无序和相互作用的相互作用。我们表明，相互作用可以有效地取消阻尼布洛赫振荡（BO）由于无序势，我们提供了一个简单的模型来定性地捕捉这种屏蔽效应。我们发现，特征相互作用能，以上的相互作用和无序合作，以提高，而不是减少，阻尼BO，符合平均无序深度。这与平均场模拟的结果是一致的。
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 (BOs) 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 BOs, coincides with the average disorder depth. This is consistent with results of a mean-field simulation.