An important transport coefficient in the study of non-Abelian plasmas is the Chern-Simons diffusion rate, which parameterizes 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 quasi-topological 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.

Chern-Simons diffusion rate from higher curvature gravity / Jahnke, Viktor; Misobuchi, Anderson Seigo; Trancanelli, Diego. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 89:10(2014), pp. N/A-N/A. [10.1103/PhysRevD.89.107901]

Chern-Simons diffusion rate from higher curvature gravity

Trancanelli, Diego
2014

Abstract

An important transport coefficient in the study of non-Abelian plasmas is the Chern-Simons diffusion rate, which parameterizes 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 quasi-topological 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.
2014
89
10
N/A
N/A
Chern-Simons diffusion rate from higher curvature gravity / Jahnke, Viktor; Misobuchi, Anderson Seigo; Trancanelli, Diego. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 89:10(2014), pp. N/A-N/A. [10.1103/PhysRevD.89.107901]
Jahnke, Viktor; Misobuchi, Anderson Seigo; Trancanelli, Diego
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1177369
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