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arXiv 1802.08262cond-mat.str-el
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相互作用Floquet系统从动力学局部化到聚束

From Dynamical Localization to Bunching in interacting Floquet Systems

Yuval Baum, Evert P. L. van Nieuwenburg, Gil Refael

摘要:

我们表明,量子多体系统可以通过Floquet工程控制,即,可以通过采用周期性驱动来控制和操纵它们的特性。我们提出了一个具体的驾驶计划,允许控制的性质,移动单位和数量的扩散在通用多体系统。我们证明了这些想法的费米-哈伯德模型,驱动器呈现双占据的网站(doublons)的系统中的移动激发。特别是,我们表明,在系统中的扩散量和费米子配对的水平可以被控制和理解,仅在doublon动力学。我们发现,在一定的条件下,系统中的扩散可以完全消除。最后,我们总结我们的工作,将这些想法推广到一般的多体系统。

英文摘要:

We show that a quantum many-body system may be controlled by means of Floquet engineering, i.e., their properties may be controlled and manipulated by employing periodic driving. We present a concrete driving scheme that allows control over the nature of mobile units and the amount of diffusion in generic many-body systems. We demonstrate these ideas for the Fermi-Hubbard model, where the drive renders doubly occupied sites (doublons) the mobile excitations in the system. In particular, we show that the amount of diffusion in the system and the level of fermion-pairing may be controlled and understood solely in terms of the doublon dynamics. We find that under certain circumstances the diffusion in the system may be eliminated completely. We conclude our work by generalizing these ideas to generic many-body systems.

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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