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arXiv 0901.1236cond-mat.stat-mech
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周期驱动耗散量子系统中的开关机制

Switching mechanism in periodically driven quantum systems with dissipation

Roland Ketzmerick, Waltraut Wustmann

摘要:

我们在周期驱动和热浴弱耦合的联合作用下诱导的量子态的渐近占据中引入了一种开关机制。它利用了驱动系统中普遍存在的避免交叉点之一,即使两个涉及的Floquet状态都有很小的占用,它也能工作。它独立于初始状态和驾驶持续时间。作为一个具体的例子,这种一般的开关机制,我们展示了如何一个不对称的双阱势可以通过一个周期性的驱动,这是比不对称弱得多的上下井之间切换。

英文摘要:

We introduce a switching mechanism in the asymptotic occupations of quantum states induced by the combined effects of a periodic driving and a weak coupling to a heat bath. It exploits one of the ubiquitous avoided crossings in driven systems and works even if both involved Floquet states have small occupations. It is independent of the initial state and the duration of the driving. As a specific example of this general switching mechanism we show how an asymmetric double well potential can be switched between the lower and the upper well by a periodic driving that is much weaker than the asymmetry.

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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