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Galkowski, Jeffrey

The quantum Sabine law for resonances in transmission problems. (English) Zbl 1407.35149

Pure Appl. Anal. 1, No. 1, 27-100 (2019).
Summary: We prove a quantum version of the Sabine law from acoustics describing the location of resonances in transmission problems. This work extends the work of the author to a broader class of systems. Our main applications are to scattering by transparent obstacles, scattering by highly frequency-dependent delta potentials, and boundary stabilized wave equations. We give a sharp characterization of the resonance-free regions in terms of dynamical quantities. In particular, we relate the imaginary part of resonances, or generalized eigenvalues, to the chord lengths and reflectivity coefficients for the ray dynamics, thus proving a quantum version of the Sabine law.

Cited in 5 Documents

MSC:

35P20 Asymptotic distributions of eigenvalues in context of PDEs
35P25 Scattering theory for PDEs

Keywords:

transmission; resonances; boundary integral operators; transparent; scattering
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\textit{J. Galkowski}, Pure Appl. Anal. 1, No. 1, 27--100 (2019; Zbl 1407.35149)
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