Dissipation and decoherence effects on a moving particle in front of a dielectric plate

In this work, we consider a particle moving in front of a dielectric plate and study two of the most relevant effects of the vacuum field fluctuations: the dissipation and the decoherence of the particle's internal degrees of freedom. We consider the particle to follow a classical, macroscopica...

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Autor principal: Lombardo, Fernando César
Publicado: 2016
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24700010_v93_n6_p_Farias
http://hdl.handle.net/20.500.12110/paper_24700010_v93_n6_p_Farias
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_24700010_v93_n6_p_Farias2023-06-08T16:36:23Z Dissipation and decoherence effects on a moving particle in front of a dielectric plate Lombardo, Fernando César In this work, we consider a particle moving in front of a dielectric plate and study two of the most relevant effects of the vacuum field fluctuations: the dissipation and the decoherence of the particle's internal degrees of freedom. We consider the particle to follow a classical, macroscopically fixed trajectory. To study the dissipative effects, we calculate the in-out effective action by functionally integrating over the vacuum field and the microscopic degrees of freedom of both the plate and the particle. This in-out effective action develops an imaginary part and, hence, a nonvanishing probability for the decay (because of friction) of the initial vacuum state. We analyze how the dissipation is affected by the relative velocity between the particle and the plate and the properties of the microscopic degrees of freedom. In order to study the effects of decoherence over the internal degrees of freedom of the particle, we calculate the closed time path or Schwinger-Keldysh influence action, by functionally integrating over the vacuum field and the microscopic degrees of freedom of the plate. We estimate the decoherence time as the time needed by two different quantum configurations (of the internal degree of freedom of the particle) to be possible to differentiate from one another. We analyze the way in which the presence of the mirror affects the decoherence and the possible ways to maximize or reduce its effects. © 2016 American Physical Society. Fil:Lombardo, F.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24700010_v93_n6_p_Farias http://hdl.handle.net/20.500.12110/paper_24700010_v93_n6_p_Farias
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description In this work, we consider a particle moving in front of a dielectric plate and study two of the most relevant effects of the vacuum field fluctuations: the dissipation and the decoherence of the particle's internal degrees of freedom. We consider the particle to follow a classical, macroscopically fixed trajectory. To study the dissipative effects, we calculate the in-out effective action by functionally integrating over the vacuum field and the microscopic degrees of freedom of both the plate and the particle. This in-out effective action develops an imaginary part and, hence, a nonvanishing probability for the decay (because of friction) of the initial vacuum state. We analyze how the dissipation is affected by the relative velocity between the particle and the plate and the properties of the microscopic degrees of freedom. In order to study the effects of decoherence over the internal degrees of freedom of the particle, we calculate the closed time path or Schwinger-Keldysh influence action, by functionally integrating over the vacuum field and the microscopic degrees of freedom of the plate. We estimate the decoherence time as the time needed by two different quantum configurations (of the internal degree of freedom of the particle) to be possible to differentiate from one another. We analyze the way in which the presence of the mirror affects the decoherence and the possible ways to maximize or reduce its effects. © 2016 American Physical Society.
author Lombardo, Fernando César
spellingShingle Lombardo, Fernando César
Dissipation and decoherence effects on a moving particle in front of a dielectric plate
author_facet Lombardo, Fernando César
author_sort Lombardo, Fernando César
title Dissipation and decoherence effects on a moving particle in front of a dielectric plate
title_short Dissipation and decoherence effects on a moving particle in front of a dielectric plate
title_full Dissipation and decoherence effects on a moving particle in front of a dielectric plate
title_fullStr Dissipation and decoherence effects on a moving particle in front of a dielectric plate
title_full_unstemmed Dissipation and decoherence effects on a moving particle in front of a dielectric plate
title_sort dissipation and decoherence effects on a moving particle in front of a dielectric plate
publishDate 2016
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24700010_v93_n6_p_Farias
http://hdl.handle.net/20.500.12110/paper_24700010_v93_n6_p_Farias
work_keys_str_mv AT lombardofernandocesar dissipationanddecoherenceeffectsonamovingparticleinfrontofadielectricplate
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