Chern-Simons diffusion rate from higher curvature gravity

Texto completo
Autor(es):	Jahnke, Viktor ^[1] ; Misobuchi, Anderson Seigo ^[1] ; Trancanelli, Diego ^[1] Número total de Autores: 3
Afiliação do(s) autor(es):	^[1] Univ Sao Paulo, Inst Fis, BR-05314970 Sao Paulo - Brazil Número total de Afiliações: 1
Tipo de documento:	Artigo Científico
Fonte:	Physical Review D; v. 89, n. 10 MAY 8 2014.
Citações Web of Science:	5
Resumo
An important transport coefficient in the study of non-Abelian plasmas is the Chern-Simons diffusion rate, which parametrizes the rate of transition among the degenerate vacua of a gauge theory. We compute this quantity at strong coupling, via holography, using two theories of gravity with higher curvature corrections, namely Gauss-Bonnet gravity and quasitopological gravity. We find that these corrections may either increase or decrease the result obtained from Einstein's gravity, depending on the value of the couplings. The Chern-Simons diffusion rate for Gauss-Bonnet gravity decreases as the shear viscosity over entropy ratio is increased. (AU)

Processo FAPESP:	13/02775-0 - Aspectos da correspondência AdS/CFT
Beneficiário:	Diego Trancanelli
Modalidade de apoio:	Auxílio à Pesquisa - Regular