Trace formula for counting nodal domains on the boundaries of chaotic 2D billiards

Details Trace formula for counting nodal domains on the boundaries of chaotic 2D billiards Trace formula for counting nodal domains on the boundaries of chaotic 2D billiards

2010-06-29

arxiv.org/abs/1006.5656v2

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

Given a Dirichlet eigenfunction of a 2D quantum billiard, the boundary domain count is the number of intersections of the nodal lines with the boundary. We study the integer sequence defined by these numbers, sorted according to the energies of the eigenfunctions. Based on a variant of Berry's random wave model, we derive a semi-classical trace formula for the sequence of boundary domain counts. The formula consists of a Weyl-like smooth part, and an oscillating part which depends on classical periodic orbits and their geometry. The predictions of this trace formula are supported by numerical data computed for the Africa billiard.

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