INVESTIGADORES
PASTAWSKI Horacio Miguel
artículos
Título:
Dynamical origin of decoherence in Classically Chaotic Systems
Autor/es:
FERNANDO M. CUCCHIETTI; HORACIO M. PASTAWSKI; RODOLFO A. JALABERT
Revista:
PHYSICA A - STATISTICAL AND THEORETICAL PHYSICS
Editorial:
North-Holland
Referencias:
Lugar: Amsterdam; Año: 2000 vol. 283 p. 285 - 289
ISSN:
0378-4371
Resumen:
The decay of the overlap between a wave packet evolved with a Hamiltonian H and the same state evolved with H+S serves as a measure of the decoherence time tau-. Recent experimental and analytical evidence on classically chaotic systems suggest that, under certain conditions, tau- depends on H but not on S. By solving numerically a Hamiltonian model we nd evidence of that property provided that the system shows a Wigner{Dyson spectrum (which de nes quantum chaos) and the perturbation exceeds a crytical value de ned by the parametric correlations of the spectra.H and the same state evolved with H+S serves as a measure of the decoherence time tau-. Recent experimental and analytical evidence on classically chaotic systems suggest that, under certain conditions, tau- depends on H but not on S. By solving numerically a Hamiltonian model we nd evidence of that property provided that the system shows a Wigner{Dyson spectrum (which de nes quantum chaos) and the perturbation exceeds a crytical value de ned by the parametric correlations of the spectra.
