INVESTIGADORES
CALVO Hernan Laureano
congresos y reuniones científicas
Título:
(Poster) Semiclassical Theory of time-reversal mirror in chaotic cavities
Autor/es:
HERNAN L. CALVO; RODOLFO A. JALABERT; HORACIO M. PASTAWSKI
Lugar:
La Falda, Cordoba
Reunión:
Workshop; 6th International Workshop on Disordered Systems "From Nanodevices to Biomolecules: 50 years after Anderson and Landauer"; 2008
Institución organizadora:
UNC - Facultad de Matematica, Astronomia y Fisica
Resumen:
Time reversal mirrors have been successfully implemented for various kinds of waves propagating in complex media. In particular, acoustic waves in chaotic cavities exhibit a refocalization that is extremely robust against external perturbations or the partial use of the available information. We develop a semiclassical approach in order to quantitatively describe the refocusing signal resulting from an initially localized wave-packet. The time-dependent reconstructed signal grows linearly with the temporal window of injection, in agreement with the acoustic experiments, and reaches the same spatial extension of the original wave-packet. We explain the crucial role played by the chaotic dynamics for the reconstruction of the signal and its stability against external perturbations.
