Hybrid Fluid Models from Mutual Effective Metric Couplings

Abstract

Motivated by a semi-holographic approach to the dynamics of quark-gluon plasma which combines holographic and perturbative descriptions of a strongly coupled infrared and a more weakly coupled ultraviolet sector, we construct a hybrid two-fluid model where interactions between its two sectors are encoded by their effective metric backgrounds, which are determined mutually by their energy-momentum tensors. We derive the most general consistent ultralocal interactions such that the full system has a total conserved energy-momentum tensor in flat Minkowski space and study its consequences in and near thermal equilibrium by working out its phase structure and its hydrodynamic modes.

1+54 pages, 15 figures; v3: minor additions, synced with JHEP version

References in corpus (4)

• The Color Glass Condensate
• The QCD equation of state with dynamical quarks
• Improved Holographic QCD
• A semi-holographic model for heavy-ion collisions

Cited by in corpus (13)

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• Hydrodynamic attractor and novel fixed points in superfluid Bjorken flow
• Time-dependent $NAd{S}_2$ holography with applications
• Hydrodynamization in hybrid Bjorken flow attractors
• How Gubser flow ends in a holographic conformal theory
• Holographic Gubser flow: A combined analytic and numerical study
• Colliding poles with colliding nuclei
• Generalized conformal quantum mechanics as an ideal observer in two-dimensional gravity
• Hybrid thermalization in the large $N$ limit