All Outputs (43)

Cosmological particle production at strong coupling (2015)
Journal Article

We study the dynamics of a strongly-coupled quantum field theory in a cosmological spacetime using the holographic AdS/CFT correspondence. Specifically we consider a confining gauge theory in an expanding FRWuniverse and track the evolution of the st... Read More about Cosmological particle production at strong coupling.

Spatial modulation and conductivities in effective holographic theories (2015)
Journal Article

We analyze a class of bottom-up holographic models for low energy thermo-electric transport. The models we focus on belong to a family of Einstein-Maxwell-dilaton theories parameterized by two scalar functions, characterizing the dilaton self-interac... Read More about Spatial modulation and conductivities in effective holographic theories.

Adiabatic hydrodynamics: the eightfold way to dissipation (2015)
Journal Article

Hydrodynamics is the low-energy effective field theory of any interacting quantum theory, capturing the long-wavelength fluctuations of an equilibrium Gibbs densitymatrix. Conventionally, one views the effective dynamics in terms of the conserved cur... Read More about Adiabatic hydrodynamics: the eightfold way to dissipation.

Driven holographic CFTs (2015)
Journal Article

We study the dynamical evolution of strongly coupled field theories, initially in thermal equilibrium, under the influence of an external driving force. We model the field theory holographically using classical gravitational dynamics in an asymptotic... Read More about Driven holographic CFTs.

Permutation orbifolds and holography (2015)
Journal Article

Two dimensional conformal field theories with large central charge and a sparse low-lying spectrum are expected to admit a classical string holographic dual. We construct a large class of such theories employing permutation orbifold technology. In pa... Read More about Permutation orbifolds and holography.

Hydrodynamic Regimes of Spinning Black D3-Branes (2015)
Journal Article

We present the long-wavelength effective description of non-extremal spinning black D3-branes in flat space. Our setup is motivated by recent explorations of low energy dynamics on black brane world-volumes within the blackfold approach and its conne... Read More about Hydrodynamic Regimes of Spinning Black D3-Branes.

Causality & Holographic Entanglement Entropy (2014)
Journal Article

We identify conditions for the entanglement entropy as a function of spatial region to be compatible with causality in an arbitrary relativistic quantum field theory. We then prove that the covariant holographic entanglement entropy prescription (whi... Read More about Causality & Holographic Entanglement Entropy.

Quantum Channels in Quantum Gravity (2014)
Journal Article

The black hole final state proposal implements manifest unitarity in the process of black hole formation and evaporation in quantum gravity, by postulating a unique final state boundary condition at the singularity. We argue that this proposal can be... Read More about Quantum Channels in Quantum Gravity.

Comments on Entanglement Negativity in Holographic Field Theories (2014)
Journal Article

We explore entanglement negativity, a measure of the distillable entanglement contained in a quantum state, in relativistic field theories in various dimensions. We first give a general overview of negativity and its properties and then explain a wel... Read More about Comments on Entanglement Negativity in Holographic Field Theories.

Holographic thermal field theory on curved spacetimes (2014)
Journal Article

The AdS/CFT correspondence relates certain strongly-coupled CFTs with large effective central charge ceff to semi-classical gravitational theories with AdS asymptotics. We describe recent progress in understanding gravity duals for CFTs on non-trivia... Read More about Holographic thermal field theory on curved spacetimes.

Effective actions for anomalous hydrodynamics (2014)
Journal Article

We argue that an effective field theory of local fluid elements captures the constraints on hydrodynamic transport stemming from the presence of quantum anomalies in the underlying microscopic theory. Focussing on global current anomalies for an arbi... Read More about Effective actions for anomalous hydrodynamics.

The Spectrum of Light States in Large N Minimal Models (2014)
Journal Article

WN,k minimal models possess an interesting class of ‘light’ primaries which control much of the low energy density of states in the large N ’t Hooft limit. In this paper we conduct a detailed exploration of their distribution using a combination of n... Read More about The Spectrum of Light States in Large N Minimal Models.

Holographic entanglement and causal information in coherent states (2014)
Journal Article

Scalar solitons in global AdS4 are holographically dual to coherent states carrying a non-trivial condensate of a scalar operator. We study the holographic information content of these states, focusing on a particular spatial region, by examining the... Read More about Holographic entanglement and causal information in coherent states.

Comments on Hall transport from effective actions (2013)
Journal Article

We consider parity-odd transport in 2+1 dimensional charged fluids restricting attention to the class of non-dissipative fluids. We show that there is a two parameter family of such non-dissipative fluids which can be derived from an effective action... Read More about Comments on Hall transport from effective actions.

Global properties of causal wedges in asymptotically AdS spacetimes (2013)
Journal Article

We examine general features of causal wedges in asymptotically AdS space-times and show that in a wide variety of cases they have non-trivial topology. We also prove some general results regarding minimal area surfaces on the causal wedge boundary an... Read More about Global properties of causal wedges in asymptotically AdS spacetimes.

Holographic entanglement plateaux (2013)
Journal Article

We consider the entanglement entropy for holographic field theories in finite volume. We show that the Araki-Lieb inequality is saturated for large enough subregions, implying that the thermal entropy can be recovered from the knowledge of the region... Read More about Holographic entanglement plateaux.

Effective hydrodynamics of black D3-branes (2013)
Journal Article

The long-wavelength effective field theory of world-volume fluctuations of black D3-branes is shown to be a hydrodynamical system to leading order in a gradient expansion. We study the system on a fiducial ‘cutoff’ surface: the fluctuating geometry i... Read More about Effective hydrodynamics of black D3-branes.

Thermalization of causal holographic information (2013)
Journal Article

We study causal wedges associated with a given sub-region in the boundary of asymptotically AdS spacetimes. Part of our motivation is to better understand the recently proposed holographic observable, causal holographic information, χ, which is given... Read More about Thermalization of causal holographic information.

Non-dissipative hydrodynamics: Effective actions versus entropy current (2013)
Journal Article

While conventional hydrodynamics incorporating dissipative effects is hard to derive from an action principle, it is nevertheless possible to construct classical actions when the dissipative terms are switched off. In this note we undertake a systema... Read More about Non-dissipative hydrodynamics: Effective actions versus entropy current.

Causal Holographic Information (2012)
Journal Article

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 holographically reconstruct spacetime. We argue that given the knowle... Read More about Causal Holographic Information.