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arXiv physics/0608235physics.atom-phcond-mat.dis-nnnlin.CD
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在超冷原子中是否有可能在实验上观察到金属-绝缘体转变?

Is it possible to observe experimentally a metal-insulator transition in ultra cold atoms?

Antonio M. Garcia-Garcia, Jiao Wang

摘要:

具有某些非解析势的反冲转子避免了动力学局部化,并经历了金属-绝缘体转变。我们表明,这种过渡的典型属性仍然存在的非解析性是逐步平滑,提供的平滑是小于一定的限制值。我们已经确定了一个平滑依赖的时间尺度,使完整的动力学本地化是不存在的和量子动量分布开发的幂律尾与异常的衰变指数的情况下,导体在金属-绝缘体过渡。我们讨论在什么条件下,这些发现可以通过实验验证,使用超冷原子技术。发现超冷原子确实可以用于金属-绝缘体相变的实验研究。

英文摘要:

Kicked rotors with certain non-analytic potentials avoid dynamical localization and undergo a metal-insulator transition. We show that typical properties of this transition are still present as the non-analyticity is progressively smoothed out provided that the smoothing is less than a certain limiting value. We have identified a smoothing dependent time scale such that full dynamical localization is absent and the quantum momentum distribution develops power-law tails with anomalous decay exponents as in the case of a conductor at the metal-insulator transition. We discuss under what conditions these findings may be verified experimentally by using ultra cold atoms techniques. It is found that ultra-cold atoms can indeed be utilized for the experimental investigation of the metal-insulator transition.

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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