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Non-dissipative hydrodynamics: Effective actions versus entropy current
Jyotirmoy Bhattacharya, Sayantani Bhattacharyya, Mukund Rangamani
While conventional hydrodynamics incorporating dissipative effects is hard to derive from an action principle, it is nevertheless possible to construct classical actions when the d…
Causal Holographic Information
Veronika E. Hubeny, Mukund Rangamani
We propose a measure of holographic information based on a causal wedge construction. The motivation behind this comes from an attempt to understand how boundary field theories can…
A soliton menagerie in AdS
Simon A. Gentle, Mukund Rangamani, Benjamin Withers
We explore the behaviour of charged scalar solitons in asymptotically global AdS4 spacetimes. This is motivated in part by attempting to identify under what circumstances such obje…
Causality and the AdS Dirichlet problem
Donald Marolf, Mukund Rangamani
The (planar) AdS Dirichlet problem has previously been shown to exhibit superluminal hydrodynamic sound modes. This problem is defined by bulk gravitational dynamics with Dirichlet…