2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/95935The exact elastodynamic scattering theory is constructed to describe the spectral properties of two- and more-cylindrical cavity systems, and compared to an elastodynamic generalization of the semi-classical Gutzwiller unstable periodic orbits formulas. In contrast to quantum mechanics, complex periodic orbits associated with the surface Rayleigh waves dominate the low-frequency spectrum, and already the two-cavity system displays chaotic features.7 pages, 5 eps figures, latex (with epl.cls)Chaotic DynamicsMathematical PhysicsDynamical SystemsQuantum Physicstext