Semiclassical approach to fidelity amplitude

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The fidelity amplitude (FA) is a quantity of paramount importance in echo-type experiments. We use semiclassical theory to study the average FA for quantum chaotic systems under external perturbation. We explain analytically two extreme cases: the random dynamics limit-attained approximately by stro...

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Detalles Bibliográficos
Autores principales: García-Mata, I., Vallejos, R.O., Wisniacki, D.A.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2011
Materias:
External perturbations
Fidelity amplitude
Lyapunov decay
Quantum chaotic systems
Random dynamics
Random perturbations
Semiclassical approaches
Semiclassical theories
Chaotic systems
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_13672630_v13_n_p_GarciaMata
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:The fidelity amplitude (FA) is a quantity of paramount importance in echo-type experiments. We use semiclassical theory to study the average FA for quantum chaotic systems under external perturbation. We explain analytically two extreme cases: the random dynamics limit-attained approximately by strongly chaotic systems-and the random perturbation limit, which shows a Lyapunov decay. Numerical simulations help us to bridge the gap between both the extreme cases. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

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