Fourth-order full quantum correlations from a Langevin-Schwinger-Dyson equation

It is well known that some quantum and statistical fluctuations of a quantum field may be recovered by adding suitable stochastic sources to the mean field equations derived from the Schwinger-Keldysh (closed-time path) effective action. In this paper we show that this method can be extended to high...

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Detalles Bibliográficos
Autor principal: Calzetta, Esteban Adolfo
Publicado: 2009
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17518113_v42_n26_p_Calzetta
http://hdl.handle.net/20.500.12110/paper_17518113_v42_n26_p_Calzetta
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_17518113_v42_n26_p_Calzetta
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spelling paper:paper_17518113_v42_n26_p_Calzetta2023-06-08T16:28:41Z Fourth-order full quantum correlations from a Langevin-Schwinger-Dyson equation Calzetta, Esteban Adolfo It is well known that some quantum and statistical fluctuations of a quantum field may be recovered by adding suitable stochastic sources to the mean field equations derived from the Schwinger-Keldysh (closed-time path) effective action. In this paper we show that this method can be extended to higher correlations and higher (n-particle irreducible) effective actions. As an example, we investigate third- and fourth-order correlations by adding stochastic sources to the Schwinger-Dyson equations derived from the 2-particle irreducible effective action. This method is a simple way to investigate the nonlinear dynamics of quantum fluctuations. © 2009 IOP Publishing Ltd. Fil:Calzetta, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17518113_v42_n26_p_Calzetta http://hdl.handle.net/20.500.12110/paper_17518113_v42_n26_p_Calzetta
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description It is well known that some quantum and statistical fluctuations of a quantum field may be recovered by adding suitable stochastic sources to the mean field equations derived from the Schwinger-Keldysh (closed-time path) effective action. In this paper we show that this method can be extended to higher correlations and higher (n-particle irreducible) effective actions. As an example, we investigate third- and fourth-order correlations by adding stochastic sources to the Schwinger-Dyson equations derived from the 2-particle irreducible effective action. This method is a simple way to investigate the nonlinear dynamics of quantum fluctuations. © 2009 IOP Publishing Ltd.
author Calzetta, Esteban Adolfo
spellingShingle Calzetta, Esteban Adolfo
Fourth-order full quantum correlations from a Langevin-Schwinger-Dyson equation
author_facet Calzetta, Esteban Adolfo
author_sort Calzetta, Esteban Adolfo
title Fourth-order full quantum correlations from a Langevin-Schwinger-Dyson equation
title_short Fourth-order full quantum correlations from a Langevin-Schwinger-Dyson equation
title_full Fourth-order full quantum correlations from a Langevin-Schwinger-Dyson equation
title_fullStr Fourth-order full quantum correlations from a Langevin-Schwinger-Dyson equation
title_full_unstemmed Fourth-order full quantum correlations from a Langevin-Schwinger-Dyson equation
title_sort fourth-order full quantum correlations from a langevin-schwinger-dyson equation
publishDate 2009
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17518113_v42_n26_p_Calzetta
http://hdl.handle.net/20.500.12110/paper_17518113_v42_n26_p_Calzetta
work_keys_str_mv AT calzettaestebanadolfo fourthorderfullquantumcorrelationsfromalangevinschwingerdysonequation
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