Scattering anomalies in a resonator above the thresholds of the continuous spectrum. / Nazarov, S.A.
In: Sbornik Mathematics, No. 6, 2015, p. 782-813.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Scattering anomalies in a resonator above the thresholds of the continuous spectrum
AU - Nazarov, S.A.
PY - 2015
Y1 - 2015
N2 - © 2015 Russian Academy of Sciences (DoM), London Mathematical Society, Turpion Ltd.We consider the Dirichlet spectral problem for the Laplace operator in a multi-dimensional domain with a cylindrical outlet to infinity, a Helmholtz resonator. Using asymptotic analysis of the scattering matrix we demonstrate different types of reflection of high-amplitude near-threshold waves. One scattering type or another, unstable or stable with respect to variations of the resonator shapes, is determined by the presence or absence of stabilizing solutions at the threshold frequency, respectively. In a waveguide with two cylindrical outlets to infinity, we discover the effect of almost complete passage of the wave under 'fine tuning' of the resonator.
AB - © 2015 Russian Academy of Sciences (DoM), London Mathematical Society, Turpion Ltd.We consider the Dirichlet spectral problem for the Laplace operator in a multi-dimensional domain with a cylindrical outlet to infinity, a Helmholtz resonator. Using asymptotic analysis of the scattering matrix we demonstrate different types of reflection of high-amplitude near-threshold waves. One scattering type or another, unstable or stable with respect to variations of the resonator shapes, is determined by the presence or absence of stabilizing solutions at the threshold frequency, respectively. In a waveguide with two cylindrical outlets to infinity, we discover the effect of almost complete passage of the wave under 'fine tuning' of the resonator.
U2 - 10.1070/SM2015v206n06ABEH004479
DO - 10.1070/SM2015v206n06ABEH004479
M3 - Article
SP - 782
EP - 813
JO - Sbornik Mathematics
JF - Sbornik Mathematics
SN - 1064-5616
IS - 6
ER -
ID: 4011839