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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Autor principal: Calzetta, E.
Formato: JOUR
Acceso en línea: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
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spelling todo:paper_17518113_v42_n26_p_Calzetta2023-10-03T16:32:21Z Fourth-order full quantum correlations from a Langevin-Schwinger-Dyson equation Calzetta, E. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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.
format JOUR
author Calzetta, E.
spellingShingle Calzetta, E.
Fourth-order full quantum correlations from a Langevin-Schwinger-Dyson equation
author_facet Calzetta, E.
author_sort Calzetta, E.
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
url http://hdl.handle.net/20.500.12110/paper_17518113_v42_n26_p_Calzetta
work_keys_str_mv AT calzettae fourthorderfullquantumcorrelationsfromalangevinschwingerdysonequation
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