Partial Weyl Law for Billiards

Details Partial Weyl Law for Billiards Partial Weyl Law for Billiards

2010-10-25

arxiv.org/abs/1010.5093v2

Europhys. Lett. 94, 30004 (2011)

Physics

Quantum Physics

5 pages, 3 figures, derivation extended, cosine billiard added

Scientific paper

10.1209/0295-5075/94/30004

For two-dimensional quantum billiards we derive the partial Weyl law, i.e. the average density of states, for a subset of eigenstates concentrating on an invariant region $\Gamma$ of phase space. The leading term is proportional to the area of the billiard times the phase-space fraction of $\Gamma$. The boundary term is proportional to the fraction of the boundary where parallel trajectories belong to $\Gamma$. Our result is numerically confirmed for the mushroom billiard and the generic cosine billiard, where we count the number of chaotic and regular states, and for the elliptical billiard, where we consider rotating and oscillating states.

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