Noncoincidence of geodesic lengths and hearing elliptic quantum billiards
- Western Washington Univ., Bellingham, WA (United States)
Assume that the planar region {Omega} has a C{sup 1} boundary {delta}{Omega} and is strictly convex in the sense that the tangent angle determines a point on the boundary. The lengths of invariant circles for the billiard ball map (or caustics) accumulate on {vert_bar}{delta}{Omega}{vert_bar}. It follows from direct calculations and from relations between the lengths of invariant circles and the lengths of trajectories of the billiard ball map that under mild assumptions on the lengths of some geodesics the region satisfies the strong noncoincidence, condition. This condition plays a role in recovering the lengths of closed geodesics from the spectrum of the Laplacian. Asymptotics for the lengths of invariant circles and an application to ellipses are discussed. In addition; some examples regarding strong non coincidence are given.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 441463
- Journal Information:
- Journal of Statistical Physics, Journal Name: Journal of Statistical Physics Journal Issue: 3-4 Vol. 85; ISSN JSTPBS; ISSN 0022-4715
- Country of Publication:
- United States
- Language:
- English
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