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arXiv 1102.2470quant-phcond-mat.quant-gas
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二维Bloch振荡引起的定向相干输运

Directed coherent transport due to Bloch oscillation in two dimensions

J. M. Zhang, W. M. Liu

摘要:

我们指出,在高维情况下,与通常考虑的一维情况相反,由静力驱动的Bloch振荡可以诱导波包的输运。波包不断地振荡,但在更大的时间尺度上,它以恒定的速度永久地漂移。作为一个值得注意的特点,净输运在长期运行中总是垂直于外力,从而由它控制.我们验证了这一预测的数值和讨论的实验实现与冷原子在光晶格和二维光子晶格.

英文摘要:

We point out that in higher dimensions, in contrast to the one dimensional case considered usually, Bloch oscillation driven by a static force can induce transport of the wave packet. The wave packet oscillates constantly, but on a larger time scale it drifts at a constant velocity permanently. As a noteworthy feature, the net transport in the long run is always normal to the external force and thus controlled by it. We verify this prediction numerically and discuss its experimental realization both with cold atoms in optical lattices and with two dimensional photonic lattices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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