Browsing by Author "Strominger, Andrew"
Now showing items 120 of 46

Aspects of Symmetry in de Sitter Space
Ng, Gim Seng (20140606)We study various aspects of symmetry in fourdimensional de Sitter space (dS$_4$). 
Asymptotic Symmetries and Charges in De Sitter Space
Anninos, Dionysios; Ng, Gim Seng; Strominger, Andrew E. (Institute of Physics Publishing, 2011)The asymptotic symmetry group (ASG) at future null infinity \((I^+)\) of fourdimensional de Sitter spacetimes is defined and shown to be given by the group of threedimensional diffeomorphisms acting on \(I^+\). Finite ... 
Asymptotic symmetries of YangMills theory
Strominger, Andrew E. (Springer Science + Business Media, 2014)Asymptotic symmetries at future null infinity (I +) of Minkowski space for electrodynamics with massless charged fields, as well as nonAbelian gauge theories with gauge group G, are considered at the semiclassical level. ... 
Black hole deconstruction
Denef, Frederik; Gaiotto, Davide; Strominger, Andrew E.; Bleeken, Dieter; Yin, Xi (SpringerVerlag, 2012)A D4D0 black hole can be deconstructed into a bound state of D0 branes with a D6D6 pair containing worldvolume fluxes. The exact spacetime solution is known and resembles a D0 accretion disk surrounding a D6D6 core. We ... 
Black Hole Superradiance From Kerr/CFT
Bredberg, Irene; Hartman, Thomas; Song, Wei; Strominger, Andrew E. (Springer Verlag, 2010)The superradiant scattering of a scalar field with frequency and angular momentum (w,m) by a nearextreme Kerr black hole with mass and spin (M, J) was derived in the seventies by Starobinsky, Churilov, Press and Teukolsky. ... 
Black holes as incompressible fluids on the sphere
Bredberg, Irene; Strominger, Andrew E. (SpringerVerlag, 2012)We consider finite deformations of the p + 2dimensional Schwarzschild geometry which obey the vacuum Einstein equation, preserve the mean curvature and induced conformal metric on a sphere a distance λ from the horizon ... 
BMS supertranslations and Weinberg’s soft graviton theorem
He, Temple Mu; Lysov, Vyacheslav; Mitra, Prahar; Strominger, Andrew E. (Springer Science + Business Media, 2015)Recently it was conjectured that a certain infinitedimensional “diagonal” subgroup of BMS supertranslations acting on past and future null infinity (I − and I +) is an exact symmetry of the quantum gravity Smatrix, and ... 
Central Charge for \(AdS_2\) Quantum Gravity
Hartman, Thomas; Strominger, Andrew E. (Institute of Physics, 2009)Twodimensional Maxwelldilaton quantum gravity on \(AdS_2\) with radius \(\ell\) and a constant electric field \(E\) is studied. In conformal gauge, this is equivalent to a CFT on a strip. In order to maintain consistent ... 
CFT Duals for Extreme Black Holes
Hartman, Thomas; Murata, Keiju; Nishioka, Tatsuma; Strominger, Andrew E. (Institute of Physics Publishing, 2009)It is argued that the general fourdimensional extremal KerrNewmanAdSdS black hole is holographically dual to a (chiral half of a) twodimensional CFT, generalizing an argument given recently for the special case of ... 
Chiral Gravity in Three Dimensions
Li, Wei; Song, Wei; Strominger, Andrew E. (Springer, 2008)Three dimensional Einstein gravity with negative cosmological constant \(1/\ell^2\) deformed by a gravitational ChernSimons action with coefficient \(1/\mu\) is studied in an asymptotically \(AdS_3\) spacetime. It is ... 
Chiral Gravity, Log Gravity, and Extremal CFT
Maloney, Alexander; Song, Wei; Strominger, Andrew E. (American Physical Society, 2010)We show that the linearization of all exact solutions of classical chiral gravity around the AdS3 vacuum have positive energy. Nonchiral and negativeenergy solutions of the linearized equations are infrared divergent at ... 
Chiral Liouville Gravity
Compère, Geoffrey; Song, Wei; Strominger, Andrew E. (Springer Science + Business Media, 2013)Classical twodimensional Liouville gravity is often considered in conformal gauge which has a residual left and right Virasoro symmetry algebra. We consider an alternate, chiral, gauge which has a residual right Virasoro ... 
Chiral Scale and Conformal Invariance in 2D Quantum Field Theory
Hofman, Diego M.; Strominger, Andrew E. (American Physical Society, 2011)It is well known that a local, unitary Poincaréinvariant 2D quantum field theory with a global scaling symmetry and a discrete nonnegative spectrum of scaling dimensions necessarily has both a left and a right local ... 
Dbrane Construction of the 5D NHEK Dual
Song, Wei; Strominger, Andrew E. (SpringerVerlag, 2012)Extremal but nonsupersymmetric charged black holes with \(SU(2)_L\) spin in IIB string theory compactified to five dimensions on \(K^3 \times S^1\) are considered. These have a nearhorizon or NHEK region with an enhanced ... 
The Einstein and the NavierStokes Equations: Connecting the Two
Bredberg, Irene (20130222)This thesis establishes a precise mathematical connection between the Einstein equations of general relativity and the incompressible NavierStokes equation of fluid dynamics. We carry out a holographic analysis which ... 
Fast plunges into Kerr black holes
Hadar, Shahar; Porfyriadis, Achilleas; Strominger, Andrew E. (Springer Nature, 2015)Most extrememassratioinspirals of small compact objects into supermassive black holes end with a fast plunge from an eccentric last stable orbit. For rapidly rotating black holes such fast plunges may be studied in the ... 
Five Problems in Quantum Gravity
Strominger, Andrew E. (Elsevier, 2009)We present five open problems in quantum gravity which one might reasonably hope to solve in the next decade. Hints appearing in the literature are summarized for each one. 
Forcefree electrodynamics around extreme Kerr black holes
Lupsasca, Alexandru Victor; Rodriguez, Maria; Strominger, Andrew E. (Springer Science + Business Media, 2014)Plasmafilled magnetospheres can extract energy from a spinning black hole and provide the power source for a variety of observed astrophysical phenomena. These magnetospheres are described by the highly nonlinear equations ... 
From NavierStokes to Einstein
Bredberg, Irene; Keeler, Cynthia; Lysov, Vyacheslav; Strominger, Andrew E. (SpringerVerlag, 2012)We show by explicit construction that for every solution of the incompressible NavierStokes equation in \(p + 1\) dimensions, there is a uniquely associated “dual” solution of the vacuum Einstein equations in \(p + 2\) ... 
From PetrovEinstein to NavierStokes
Lysov, Vyacheslav (20140606)The fluid/gravity correspondence relates solutions of the incompressible NavierStokes equation to metrics which solve the Einstein equations. We propose propose two possible approaches to establish this correspondence: ...