Dynamics of a Driven Dissipative Quantum System

Risultato della ricerca: Other contribution

Abstract

We investigate the dynamics of a driven multilevel system, consisting of a particle in an asymmetric bistable potential, strongly interacting with a thermal bath according to the Caldeira-Leggett model. The populations in the discrete (position) variable representation (DVR), are obtained as solution of a Markovian approximated master equation, which is derived from a discretized path integral approach based on the Feynman-Vernon influence functional. By varying the environmental parameters (temperature and coupling strength) as well as the driving frequency and amplitude, we study the transient dynamics and stationary configuration of the system. In particular, we analyze the population of the metastable well. The asymptotic population of the metastable well displays a strong non-monotonicity, characterized by a maximum, as a function of the driving frequency. We find also that an increase of the coupling strength inhibits this effect of induced stability and slows down the dynamics, forcing the system towards the relaxation.
Lingua originaleEnglish
Stato di pubblicazionePublished - 2013

Fingerprint

baths
configurations
temperature

Cita questo

Dynamics of a Driven Dissipative Quantum System. / Magazzu', Luca.

2013, .

Risultato della ricerca: Other contribution

@misc{020585d1c7c44d61a0d0556899fcd011,
title = "Dynamics of a Driven Dissipative Quantum System",
abstract = "We investigate the dynamics of a driven multilevel system, consisting of a particle in an asymmetric bistable potential, strongly interacting with a thermal bath according to the Caldeira-Leggett model. The populations in the discrete (position) variable representation (DVR), are obtained as solution of a Markovian approximated master equation, which is derived from a discretized path integral approach based on the Feynman-Vernon influence functional. By varying the environmental parameters (temperature and coupling strength) as well as the driving frequency and amplitude, we study the transient dynamics and stationary configuration of the system. In particular, we analyze the population of the metastable well. The asymptotic population of the metastable well displays a strong non-monotonicity, characterized by a maximum, as a function of the driving frequency. We find also that an increase of the coupling strength inhibits this effect of induced stability and slows down the dynamics, forcing the system towards the relaxation.",
author = "Luca Magazzu'",
year = "2013",
language = "English",
type = "Other",

}

TY - GEN

T1 - Dynamics of a Driven Dissipative Quantum System

AU - Magazzu', Luca

PY - 2013

Y1 - 2013

N2 - We investigate the dynamics of a driven multilevel system, consisting of a particle in an asymmetric bistable potential, strongly interacting with a thermal bath according to the Caldeira-Leggett model. The populations in the discrete (position) variable representation (DVR), are obtained as solution of a Markovian approximated master equation, which is derived from a discretized path integral approach based on the Feynman-Vernon influence functional. By varying the environmental parameters (temperature and coupling strength) as well as the driving frequency and amplitude, we study the transient dynamics and stationary configuration of the system. In particular, we analyze the population of the metastable well. The asymptotic population of the metastable well displays a strong non-monotonicity, characterized by a maximum, as a function of the driving frequency. We find also that an increase of the coupling strength inhibits this effect of induced stability and slows down the dynamics, forcing the system towards the relaxation.

AB - We investigate the dynamics of a driven multilevel system, consisting of a particle in an asymmetric bistable potential, strongly interacting with a thermal bath according to the Caldeira-Leggett model. The populations in the discrete (position) variable representation (DVR), are obtained as solution of a Markovian approximated master equation, which is derived from a discretized path integral approach based on the Feynman-Vernon influence functional. By varying the environmental parameters (temperature and coupling strength) as well as the driving frequency and amplitude, we study the transient dynamics and stationary configuration of the system. In particular, we analyze the population of the metastable well. The asymptotic population of the metastable well displays a strong non-monotonicity, characterized by a maximum, as a function of the driving frequency. We find also that an increase of the coupling strength inhibits this effect of induced stability and slows down the dynamics, forcing the system towards the relaxation.

UR - http://hdl.handle.net/10447/83747

M3 - Other contribution

ER -