Decoherence, tunneling, and noise-induced activation in a double-potential well at high and zero temperature

We study the effects of the environment on tunneling in an open system described by a static double-well potential. We describe the evolution of a quantum state localized in one of the minima of the potential at t=0, in both the limits of high and zero environment temperature. We show that the evolu...

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Detalles Bibliográficos
Autores principales: Antunes, N.D., Lombardo, F.C., Monteoliva, D., Villar, P.I.
Formato: JOUR
Materias:
Coherent light
Computer simulation
Electron tunneling
Large scale systems
Numerical methods
Thermal effects
Time series analysis
Corresponding time scales
Decoherence
Noise-induced activation
Static double-well potentials
Semiconductor quantum wells
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_15393755_v73_n6_p_Antunes
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:We study the effects of the environment on tunneling in an open system described by a static double-well potential. We describe the evolution of a quantum state localized in one of the minima of the potential at t=0, in both the limits of high and zero environment temperature. We show that the evolution of the system can be summarized in terms of three main physical phenomena-namely, decoherence, quantum tunneling, and noise-induced activation-and we obtain analytical estimates for the corresponding time scales. These analytical predictions are confirmed by large-scale numerical simulations, providing a detailed picture of the main stages of the evolution and of the relevant dynamical processes. © 2006 The American Physical Society.

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