Scherk-Schwarz reduction of a neutral viscous conformal fluid yields a dissipative colored fluid in lower dimensions with explicit maps for equation of state, sound speed, color currents, entropy current, and first-order transport coefficients including η, τ, and κ.
New theories of relativistic hydrodynamics in the LHC era
11 Pith papers cite this work. Polarity classification is still indexing.
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Pith papers citing it
abstract
The success of relativistic hydrodynamics as an essential part of the phenomenological description of heavy-ion collisions at RHIC and the LHC has motivated a significant body of theoretical work concerning its fundamental aspects. Our review presents these developments from the perspective of the underlying microscopic physics, using the language of quantum field theory, relativistic kinetic theory, and holography. We discuss the gradient expansion, the phenomenon of hydrodynamization, as well as several models of hydrodynamic evolution equations, highlighting the interplay between collective long-lived and transient modes in relativistic matter. Our aim to provide a unified presentation of this vast subject -- which is naturally expressed in diverse mathematical languages -- has also led us to include several new results on the large-order behaviour of the hydrodynamic gradient~expansion.
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Any stand-alone dissipative hydrodynamic EFT is acausal; causal UV completions exist that preserve the exact IR hydrodynamic mode for subluminal sound speed and finite gradient-expansion radius.
Deterministic confluent equations are derived for three-point correlations of non-Gaussian fluctuations in relativistic stochastic hydrodynamics, including fluctuating velocity, using a covariant formalism in the average local Landau frame.
Local-equilibrium density operators built only from genuine conserved currents are invariant under pseudo-gauge and improvement transformations of the energy-momentum and spin tensors.
Finite current relaxation introduces memory effects that suppress, shift, and reshape non-monotonic cumulant behavior relative to instantaneous equilibrium and Fickian diffusion, most visibly in higher-order cumulants.
Derives diffusion matrix elements for baryon, charge, and strangeness transport in relativistic hydrodynamics from entropy production within the relaxation-time approximation.
Preliminary simulations show charm quarks lose significantly less transverse momentum in a fluctuating color string medium than in the hydrodynamic expansion of the EPOS4HQ model.
VAH simulations in (2+1)D Bjorken flow with transverse expansion show an extended applicability domain over standard viscous hydrodynamics when compared to relaxation-time approximation kinetic theory.
Toy models show multi-particle correlators can increase rather than reduce deviation from true flow harmonics in small collision systems.
Spacetime-symmetry-breaking Goldstone EFTs systematically describe bulk and localized excitations of solids, fluids, and superfluids, with new thermodynamic identifications and corrected scattering rates.
Non-conformal deformation via Einstein-dilaton gravity increases the radius of convergence of the derivative expansion for gapped quasinormal modes of a scalar operator in the holographic dual.
citing papers explorer
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Dissipative non-Abelian fluids from Scherk-Schwarz dimensional reduction
Scherk-Schwarz reduction of a neutral viscous conformal fluid yields a dissipative colored fluid in lower dimensions with explicit maps for equation of state, sound speed, color currents, entropy current, and first-order transport coefficients including η, τ, and κ.
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Causal UV completions of relativistic hydrodynamics
Any stand-alone dissipative hydrodynamic EFT is acausal; causal UV completions exist that preserve the exact IR hydrodynamic mode for subluminal sound speed and finite gradient-expansion radius.
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Non-Gaussian fluctuations in relativistic hydrodynamics: Confluent equations for three-point correlations
Deterministic confluent equations are derived for three-point correlations of non-Gaussian fluctuations in relativistic stochastic hydrodynamics, including fluctuating velocity, using a covariant formalism in the average local Landau frame.
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A symmetry-based resolution of pseudo-gauge ambiguities in local equilibrium
Local-equilibrium density operators built only from genuine conserved currents are invariant under pseudo-gauge and improvement transformations of the energy-momentum and spin tensors.
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Cumulant dynamics in finite-memory diffusion
Finite current relaxation introduces memory effects that suppress, shift, and reshape non-monotonic cumulant behavior relative to instantaneous equilibrium and Fickian diffusion, most visibly in higher-order cumulants.
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Diffusion of multiple conserved charges from entropy production
Derives diffusion matrix elements for baryon, charge, and strangeness transport in relativistic hydrodynamics from entropy production within the relaxation-time approximation.
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Energy loss of heavy-flavor quarks in color string medium
Preliminary simulations show charm quarks lose significantly less transverse momentum in a fluctuating color string medium than in the hydrodynamic expansion of the EPOS4HQ model.
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Extended applicability domain of viscous anisotropic hydrodynamics in (2+1)-D Bjorken flow with transverse expansion
VAH simulations in (2+1)D Bjorken flow with transverse expansion show an extended applicability domain over standard viscous hydrodynamics when compared to relaxation-time approximation kinetic theory.
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Effectiveness of nonflow suppression using multi-particle correlators
Toy models show multi-particle correlators can increase rather than reduce deviation from true flow harmonics in small collision systems.
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Effective Field Theories for Material Media
Spacetime-symmetry-breaking Goldstone EFTs systematically describe bulk and localized excitations of solids, fluids, and superfluids, with new thermodynamic identifications and corrected scattering rates.
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Effect of non-conformal deformation on the gapped quasi-normal modes and the holographic implications
Non-conformal deformation via Einstein-dilaton gravity increases the radius of convergence of the derivative expansion for gapped quasinormal modes of a scalar operator in the holographic dual.