Zobrazeno 1 - 10
of 185
pro vyhledávání: '"Serreau, J."'
Publikováno v:
Phys. Rev. D 102, 125015 (2020)
We propose a $1/N$ expansion of Starobinsky and Yokoyama's effective stochastic approach for light quantum fields on superhorizon scales in de Sitter spacetime. We explicitly compute the spectrum and the eigenfunctions of the Fokker-Planck operator f
Externí odkaz:
http://arxiv.org/abs/2004.09157
Autor:
Moreau, G., Serreau, J.
Publikováno v:
Phys. Rev. D 101, 045015 (2020)
The quantum fluctuations of a test scalar field on superhorizon scale in de Sitter spacetime can be described by an effective one-dimensional stochastic theory corresponding to a particular class of nonequilibrium dynamical systems known as the model
Externí odkaz:
http://arxiv.org/abs/1912.05358
Autor:
Moreau, G., Serreau, J.
Publikováno v:
Phys. Rev. D 99, 025011 (2019)
We study the backreaction of gravitationally amplified quantum fluctuations of scalar fields on a classical de Sitter geometry. We formulate the problem in the framework of the Wilsonian renormalisation group, which allows us to treat the scalar fiel
Externí odkaz:
http://arxiv.org/abs/1809.03969
Publikováno v:
Phys. Rev. D 97, 074027 (2018)
We extend a previous investigation of the QCD phase diagram with heavy quarks in the context of background field methods by including the two-loop corrections to the background field effective potential. The nonperturbative dynamics in the pure-gauge
Externí odkaz:
http://arxiv.org/abs/1710.01930
Publikováno v:
Phys. Rev. D 95, 045014 (2017)
We compute the finite temperature ghost and gluon propagators of Yang-Mills theory in the Landau-DeWitt gauge. The background field that enters the definition of the latter is intimately related with the (gauge-invariant) Polyakov loop and serves as
Externí odkaz:
http://arxiv.org/abs/1606.08012
Publikováno v:
Phys. Rev. D 93, 105002 (2016)
We study the confinement-deconfinement phase transition of pure Yang-Mills theories at finite temperature using a simple massive extension of standard background field methods. We generalize our recent next-to-leading-order perturbative calculation o
Externí odkaz:
http://arxiv.org/abs/1511.07690
In a recent work we have proposed a perturbative approach for the study of the phase transition of pure Yang-Mills theories at finite temperature. This is based on a simple massive extension of background field methods in the Landau-DeWitt gauge, whe
Externí odkaz:
http://arxiv.org/abs/1412.5672
We consider a simple massive extension of the Landau-DeWitt gauge for SU($N$) Yang-Mills theory. We compute the corresponding one-loop effective potential for a temporal background gluon field at finite temperature. At this order the background field
Externí odkaz:
http://arxiv.org/abs/1407.6469
We consider the two-point correlators of Yang-Mills theories at finite temperature in the Landau gauge. We employ a model for the corresponding Yang-Mills correlators based on the inclusion of an effective mass term for gluons. The latter is expected
Externí odkaz:
http://arxiv.org/abs/1311.6116
Autor:
Parentani, R., Serreau, J.
We propose a new approach to compute correlators of quantum fields in de Sitter space. It is based on nonequilibrium field theory techniques, and exploits de Sitter symmetries so as to partially reduce the number of independent variables of n-point f
Externí odkaz:
http://arxiv.org/abs/1212.6077