Consistent holographic description of boost-invariant plasma

TL;DR

This paper presents a refined holographic approach to modeling boost-invariant plasma flow, resolving previous singularities and accurately reproducing the plasma's energy-momentum tensor within second order viscous hydrodynamics.

Contribution

It introduces a new expansion parameter that eliminates curvature singularities in the gravity dual of boost-invariant plasma.

Findings

Successfully resolves previous singularity issues

Accurately reproduces energy-momentum tensor

Aligns with second order viscous hydrodynamics

Abstract

Prior attempts to construct the gravity dual of boost-invariant flow of N=4 supersymmetric Yang-Mills gauge theory plasma suffered from apparent curvature singularities in the late time expansion. This Letter shows how these problems can be resolved by a different choice of expansion parameter. The calculations presented correctly reproduce the plasma energy-momentum tensor within the framework of second order viscous hydrodynamics.