125 citations · 178 across the 8 of their papers we have counts for
8 papers
Instability of 5D Gauss-Bonnet black branes
Alex Buchel, Raphael E. Hoult, Pavel Kovtun
We show that Gauss-Bonnet black branes in five-dimensional anti-de Sitter gravity are unstable when the Gauss-Bonnet coupling falls outside the range allowed by the conformal colli…
Causality constraints and anisotropic states
Raphael E. Hoult
We investigate the effects of anisotropy on dispersion relations and convergence in relativistic hydrodynamics. In particular, we show that for dispersion relations with a branch p…
Causal Theories of Relativistic Hydrodynamics
Raphael E. Hoult
The first-order textbook formulations of relativistic viscous hydrodynamics are unstable and acausal. These shortcomings may be rectified by using effective theories which maintain…
Causality in dissipative relativistic magnetohydrodynamics
Raphael E. Hoult, Pavel Kovtun
We explore the relationship between linear and non-linear causality in theories of dissipative relativistic fluid dynamics. While for some fluid-dynamical theories, a linearized ca…
Causal and Stable Superfluid Hydrodynamics
Raphael E. Hoult, Ashish Shukla
We investigate the linearized stability and causality properties of relativistic viscous superfluid hydrodynamics. The Landau-Lifshitz-Clark-Putterman formulation for the theory of…
Causality and classical dispersion relations
Raphael E. Hoult, Pavel Kovtun
We explore the consequences of relativistic causality and covariant stability for short-wavelength dispersion relations in classical systems. For excitations described by a finite…
Causal first-order hydrodynamics from kinetic theory and holography
Raphael E. Hoult, Pavel Kovtun
We show how causal relativistic Navier-Stokes equations arise from the relativistic Boltzmann equation: the causality is preserved via a judicious choice of the zero modes of the c…
Stable and causal relativistic Navier-Stokes equations
Raphael E. Hoult, Pavel Kovtun
Relativistic Navier-Stokes equations express the conservation of the energy-momentum tensor and the particle number current in terms of the local hydrodynamic variables: temperatur…