Semiclassical Description of Tunneling in Mixed Systems: The Case of the Annular Billiard

Details Semiclassical Description of Tunneling in Mixed Systems: The Case of the Annular Billiard Semiclassical Description of Tunneling in Mixed Systems: The Case of the Annular Billiard

1995-05-03

arxiv.org/abs/cond-mat/9505010v3

Phys. Rev. Lett. 75, 3661 (1995).

Physics

Condensed Matter

4 pages, uuencoded postscript file, replaces a corrupted version

Scientific paper

10.1103/PhysRevLett.75.3661

We study quantum-mechanical tunneling between symmetry-related pairs of regular phase space regions that are separated by a chaotic layer. We consider the annular billiard, and use scattering theory to relate the splitting of quasi-degenerate states quantized on the two regular regions to specific paths connecting them. The tunneling amplitudes involved are given a semiclassical interpretation by extending the billiard boundaries to complex space and generalizing specular reflection to complex rays. We give analytical expressions for the splittings, and show that the dominant contributions come from {\em chaos-assisted}\/ paths that tunnel into and out of the chaotic layer.

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