4 papers
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…
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…
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…
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…