401 citations · 3.8k across the 56 of their papers we have counts for
43 papers · 1 filter
Analog gravity and the continuum effective theory of the graphene tight binding lattice model
Matthew M. Roberts, Toby Wiseman
We consider the tight-binding model of graphene with slowly spatially varying hopping functions. We develop a low energy approximation as a derivative expansion in a Dirac spinor t…
A dynamical formulation of ghost-free massive gravity
Claudia de Rham, Jan Kożuszek, Andrew J. Tolley +1
We present a formulation of ghost-free massive gravity with flat reference metric that exhibits the full non-linear constraint algebraically, in a way that can be directly implemen…
Gradient flow of Einstein-Maxwell theory and Reissner-Nordström black holes
Davide De Biasio, Julian Freigang, Dieter Lust +1
Ricci flow is a natural gradient flow of the Einstein-Hilbert action. Here we consider the analog for the Einstein-Maxwell action, which gives Ricci flow with a stress tensor contr…
A Surprising Similarity Between Holographic CFTs and a Free Fermion in Dimensions
Krai Cheamsawat, Sebastian Fischetti, Lucas Wallis +1
We compare the behavior of the vacuum free energy (i.e. the Casimir energy) of various -dimensional CFTs on an ultrastatic spacetime as a function of the spatial geometry. T…
Three-dimensional super-Yang--Mills theory on the lattice and dual black branes
Simon Catterall, Joel Giedt, Raghav G. Jha +2
In the large- and strong-coupling limit, maximally supersymmetric SU() Yang--Mills theory in dimensions is conjectured to be dual to the decoupling limit of a stack…
Does the Round Sphere Maximize the Free Energy of (2+1)-Dimensional QFTs?
Sebastian Fischetti, Lucas Wallis, Toby Wiseman
We examine the renormalized free energy of the free Dirac fermion and the free scalar on a (2+1)-dimensional geometry , with having spherical topology and…
A new energy upper bound for AdS black holes inspired by free field theory
Krai Cheamsawat, Gary Gibbons, Toby Wiseman
We consider the toroidally compactified planar AdS-Schwarzschild solution to 4-dimensional gravity with negative cosmological constant. This has a flat torus conformal boundary met…
Free energy dependence on spatial geometry for (2+1)-dimensional QFTs
Krai Cheamsawat, Lucas Wallis, Toby Wiseman
We consider (2+1)-QFT at finite temperature on a product of time with a static spatial geometry. The suitably defined difference of thermal vacuum free energy for the QFT on a defo…
What spatial geometry does the (2+1)-dimensional QFT vacuum prefer?
Sebastian Fischetti, Lucas Wallis, Toby Wiseman
We consider relativistic (2+1)-QFTs on a product of time with a two-space and study the vacuum free energy as a functional of the temperature and spatial geometry. We focus on free…
Testing holography using lattice super-Yang--Mills on a 2-torus
Simon Catterall, Raghav G. Jha, David Schaich +1
We consider maximally supersymmetric SU(N) Yang--Mills theory in Euclidean signature compactified on a flat two-dimensional torus with anti-periodic (`thermal') fermion boundary co…
On Universality of Holographic Results for (2+1)-Dimensional CFTs on Curved Spacetimes
Sebastian Fischetti, Toby Wiseman
The behavior of holographic CFTs is constrained by the existence of a bulk dual geometry. For example, in (2+1)-dimensional holographic CFTs living on a static spacetime with compa…
A Bound on Holographic Entanglement Entropy from Inverse Mean Curvature Flow
Sebastian Fischetti, Toby Wiseman
Entanglement entropies are notoriously difficult to compute. Large-N strongly-coupled holographic CFTs are an important exception, where the AdS/CFT dictionary gives the entangleme…
Bounds on the local energy density of holographic CFTs from bulk geometry
Sebastian Fischetti, Andrew Hickling, Toby Wiseman
The stress tensor is a basic local operator in any field theory; in the context of AdS/CFT, it is the operator which is dual to the bulk geometry itself. Here we exploit this featu…
Vacuum energy is non-positive for (2+1)-dimensional holographic CFTs
Andrew Hickling, Toby Wiseman
We consider a (2+1)-dimensional holographic CFT on a static spacetime with globally timelike Killing vector. Taking the spatial geometry to be closed but otherwise general we expec…
AdS/CFT and the geometry of an energy gap
Andrew Hickling, Toby Wiseman
We consider a CFT defined on a static metric that is the product of time with a smooth closed space of positive scalar curvature. We expect the theory to exhibit an energy gap and…
Moduli dynamics as a predictive tool for thermal maximally supersymmetric Yang-Mills at large N
Takeshi Morita, Shotaro Shiba, Toby Wiseman +1
Maximally supersymmetric (p+1)-dimensional Yang-Mills theory at large N and finite temperature, with possibly compact spatial directions, has a rich phase structure. Strongly coupl…
Null infinity and extremal horizons in AdS-CFT
Andrew Hickling, James Lucietti, Toby Wiseman
We consider AdS gravity duals to CFT on background spacetimes with a null infinity. Null infinity on the conformal boundary may extend to an extremal horizon in the bulk. For examp…
Warm p-soup and near extremal black holes
Takeshi Morita, Shotaro Shiba, Toby Wiseman +1
We consider a model of D-dimensional supergravity coupled to elementary p-branes. We use gravitational arguments to deduce the low energy effective theory of N nearly parallel bran…
On black hole thermodynamics from super Yang-Mills
Toby Wiseman
We consider maximally supersymmetric U(N) Yang-Mills in (1+p)-dimensions for p < 3. In the 't Hooft large N limit this is conjectured to be dual to N Dp-branes in the decoupling li…
Stationary holographic plasma quenches and numerical methods for non-Killing horizons
Pau Figueras, Toby Wiseman
We explore use of the harmonic Einstein equations to numerically find stationary black holes where the problem is posed on an ingoing slice that extends into the interior of the bl…
Holographic Superfluids and the Dynamics of Symmetry Breaking
M. J. Bhaseen, Jerome P. Gauntlett, B. D. Simons +2
We explore the far from equilibrium response of a holographic superfluid using the AdS/CFT correspondence. We establish the dynamical phase diagram corresponding to quantum quenche…
NR/HEP: roadmap for the future
Vitor Cardoso, Leonardo Gualtieri, Carlos Herdeiro +29
Physics in curved spacetime describes a multitude of phenomena, ranging from astrophysics to high energy physics. The last few years have witnessed further progress on several fron…
Gravity and large black holes in Randall-Sundrum II braneworlds
Pau Figueras, Toby Wiseman
We show how to construct low energy solutions to the Randall Sundrum II (RSII) model using an associated AdS_5-CFT_4 problem. The RSII solution is given in terms of a perturbation…
Ricci solitons, Ricci flow, and strongly coupled CFT in the Schwarzschild Unruh or Boulware vacua
Pau Figueras, James Lucietti, Toby Wiseman
The elliptic Einstein-DeTurck equation may be used to numerically find Einstein metrics on Riemannian manifolds. Static Lorentzian Einstein metrics are considered by analytically c…