Scattering fidelity in elastodynamics. II. Further experimental results

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Oleg I. Lobkis and Richard L. Weaver
Department of Physics, University of Illinois, 1110 West Green Street MC 704, Urbana, Illinois 61801, USA

Received 17 March 2008; revised 16 June 2008; published 18 December 2008

Theagreement of past measurements of elastodynamic scattering fidelity with predictionsbased on random matrix theory, even in bodies with ostensiblyregular ray dynamics, has motivated further measurements with a precisioncapable of detecting fine deviations. Two aluminum blocks are studied,one rectangular, one irregular. As previously, it is found thatfidelity decays more slowly in the irregular object. It isfurther shown that the time dependence of that decay correspondswell with predictions based on random matrix theory and theGaussian orthogonal ensemble and that predictions based on Poissonian modelstatistics do not correspond. In some cases deviations from theoryare seen that are consistent with partially broken reflection symmetriesand inhomogeneous dissipation.

URL:	http://link.aps.org/doi/10.1103/PhysRevE.78.066212
DOI:	10.1103/PhysRevE.78.066212
PACS:	05.45.Mt; 43.35.+d; 03.65.Sq 05.45.Mt Quantum chaos; semiclassical methods 43.35.+d Ultrasonics, quantum acoustics, and physical effects of sound 03.65.Sq Semiclassical theories and applications in quantum mechanics YEAR: 2008
KEYWORDS:	aluminium, elastodynamics, statistical analysis

REFERENCES (19)

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