Study of sphaleron transitions by means of the real-time Langevin equation

Autor:	P. de Forcrand, Alexander Bochkarev
Rok vydání:	1991
Předmět:	Physics Langevin equation High Energy Physics::Theory Quantum mechanics Saddle point High Energy Physics::Phenomenology Lattice field theory Vacuum state Gauge theory Abelian group Sphaleron Brownian motion
Zdroj:	Physical review. D, Particles and fields. 44(2)
ISSN:	0556-2821
Popis:	Microscopic Langevin evolution is introduced in Abelian gauge field theory. It is studied numerically in the (1+1)-dimensional Abelian Higgs model at finite temperature. The Brownian behavior of the Chern-Simons number is established. Sharp transitions between the classical vacua with different Chern-Simons numbers are observed. The rate of these transitions depends exponentially on the temperature, indicating the relevance of the thermal activation theory involving the sphaleron saddle point.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf289721ebdda0440f80f05f5e6fee78 https://pubmed.ncbi.nlm.nih.gov/10013905 Zobrazit plný text záznamu