Switching mechanism in periodically driven quantum systems with dissipation

Details Switching mechanism in periodically driven quantum systems with dissipation Switching mechanism in periodically driven quantum systems with dissipation

2009-01-09

arxiv.org/abs/0901.1236v2

Phys. Rev. E 80, 021117 (2009)

Physics

Condensed Matter

Statistical Mechanics

5 pages, 5 figures

Scientific paper

10.1103/PhysRevE.80.021117

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.

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