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arXiv 1101.3206nlin.CDcond-mat.mes-hall
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准周期受击转子中的量子相变

Quantum phase transitions in the quasi-periodic kicked rotor

Chushun Tian, Alexander Altland, Markus Garst

摘要:

我们提出了一个微观理论的准周期性驱动的环境(踢转子),实现在最近的原子光学实验中的运输。我们发现,这些系统的行为敏感地依赖于普朗克常数$\tilde h$的值:对于$\tilde h/(4π)$的非理性值,它们属于无序电子系统的普遍性类,我们推导出随后的本地化现象的微观理论。相反,对于合理的值,转子-安德森绝缘体获得了无限的(静态)电导率,并变成了“超级金属”。相应的金属/超金属过渡的签名进行了讨论。

英文摘要:

We present a microscopic theory of transport in quasi-periodically driven environments (`kicked rotors'), as realized in recent atom optic experiments. We find that the behavior of these systems depends sensitively on the value of Planck's constant $\tilde h$: for irrational values of $\tilde h/(4π)$ they fall into the universality class of disordered electronic systems and we derive the microscopic theory of the ensuing localization phenomena. In contrast, for rational values the rotor-Anderson insulator acquires an infinite (static) conductivity and turns into a `super-metal'. Signatures of the corresponding metal/super-metal transition are discussed.

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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