Transient Dynamics of a Driven Quantum Bistable System

Risultato della ricerca: Other contribution

Abstract

We study the transient dynamics and the asymptotic behaviour of a multilevel system in the strong dissipation regime. The system is modeled as a periodically driven quantum particle in an asymmetric double well potential, interacting with the bosonic heat bath of the Caldeira-Leggett model. The analytical approach used is non-perturbative in the particle-bath coupling and is based on a space-discretized path integral expression for the particle’s reduced density matrix. By a suitable approximationon the Feynman-Vernon influence functional a Markov-approximated master equation is obtained for the populations in the Discrete Variable Representation (DVR).
Lingua originaleEnglish
Stato di pubblicazionePublished - 2013

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title = "Transient Dynamics of a Driven Quantum Bistable System",
abstract = "We study the transient dynamics and the asymptotic behaviour of a multilevel system in the strong dissipation regime. The system is modeled as a periodically driven quantum particle in an asymmetric double well potential, interacting with the bosonic heat bath of the Caldeira-Leggett model. The analytical approach used is non-perturbative in the particle-bath coupling and is based on a space-discretized path integral expression for the particle’s reduced density matrix. By a suitable approximationon the Feynman-Vernon influence functional a Markov-approximated master equation is obtained for the populations in the Discrete Variable Representation (DVR).",
keywords = "Quantum systems with finite Hilbert space; Decoherence; open systems; quantum statistical methods; Fluctuation phenomena, and Brownian motion, noise, random processes",
author = "Bernardo Spagnolo and Luca Magazzu' and Davide Valenti",
year = "2013",
language = "English",
type = "Other",

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T1 - Transient Dynamics of a Driven Quantum Bistable System

AU - Spagnolo, Bernardo

AU - Magazzu', Luca

AU - Valenti, Davide

PY - 2013

Y1 - 2013

N2 - We study the transient dynamics and the asymptotic behaviour of a multilevel system in the strong dissipation regime. The system is modeled as a periodically driven quantum particle in an asymmetric double well potential, interacting with the bosonic heat bath of the Caldeira-Leggett model. The analytical approach used is non-perturbative in the particle-bath coupling and is based on a space-discretized path integral expression for the particle’s reduced density matrix. By a suitable approximationon the Feynman-Vernon influence functional a Markov-approximated master equation is obtained for the populations in the Discrete Variable Representation (DVR).

AB - We study the transient dynamics and the asymptotic behaviour of a multilevel system in the strong dissipation regime. The system is modeled as a periodically driven quantum particle in an asymmetric double well potential, interacting with the bosonic heat bath of the Caldeira-Leggett model. The analytical approach used is non-perturbative in the particle-bath coupling and is based on a space-discretized path integral expression for the particle’s reduced density matrix. By a suitable approximationon the Feynman-Vernon influence functional a Markov-approximated master equation is obtained for the populations in the Discrete Variable Representation (DVR).

KW - Quantum systems with finite Hilbert space; Decoherence; open systems; quantum statistical methods; Fluctuation phenomena

KW - and Brownian motion

KW - noise

KW - random processes

UR - http://hdl.handle.net/10447/83746

M3 - Other contribution

ER -