Drag force in a D-instanton background

Abstract

We study the drag force and diffusion coefficient with respect to a moving heavy quark in a D-instanton background, which corresponds to the Yang-Mills theory in the deconfining, high-temperature phase. It is shown that the presence of the D-instanton density tends to increase the drag force and decrease the diffusion coefficient, reverse to the effects of the velocity and the temperature. Moreover, the inclusion of the D-instanton density makes the medium less viscous.

arXiv comment6 pages, 2 figures

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• Drag force on a moving heavy quark with deformed string configuration
• Holographic drag force with translational symmetry breaking