Adagideli, Inanc and Beenakker, C. (2002) Ehrenfest-time-dependent excitation gap in a chaotic Andreev billiard. Physical Review Letters 89, p. 237002.
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A semiclassical theory is developed for the appearance of an excitation gap in a ballistic chaotic cavity connected by a point contact to a superconductor. Diffraction at the point contact is a singular perturbation in the limit , which opens up a gap in the excitation spectrum. The time scale (with the Lyapunov exponent) is the Ehrenfest time, the characteristic time scale of quantum chaos.
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||05 Aug 2009 13:33|