Now showing items 1-20 of 46

    • Aspects of Symmetry in de Sitter Space 

      Ng, Gim Seng (2014-06-06)
      We study various aspects of symmetry in four-dimensional 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 four-dimensional de Sitter spacetimes is defined and shown to be given by the group of three-dimensional diffeomorphisms acting on \(I^+\). Finite ...
    • Asymptotic symmetries of Yang-Mills 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 non-Abelian 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 (Springer-Verlag, 2012)
      A D4-D0 black hole can be deconstructed into a bound state of D0 branes with a D6-D6 pair containing worldvolume fluxes. The exact spacetime solution is known and resembles a D0 accretion disk surrounding a D6-D6 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 near-extreme 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. (Springer-Verlag, 2012)
      We consider finite deformations of the p + 2-dimensional 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 infinite-dimensional “diagonal” subgroup of BMS supertranslations acting on past and future null infinity (I − and I +) is an exact symmetry of the quantum gravity S-matrix, and ...
    • Central Charge for \(AdS_2\) Quantum Gravity 

      Hartman, Thomas; Strominger, Andrew E. (Institute of Physics, 2009)
      Two-dimensional Maxwell-dilaton 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 four-dimensional extremal Kerr-Newman-AdS-dS black hole is holographically dual to a (chiral half of a) two-dimensional 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 Chern-Simons 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. Non-chiral and negative-energy 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 two-dimensional 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 Poincaré-invariant 2D quantum field theory with a global scaling symmetry and a discrete non-negative spectrum of scaling dimensions necessarily has both a left and a right local ...
    • D-brane Construction of the 5D NHEK Dual 

      Song, Wei; Strominger, Andrew E. (Springer-Verlag, 2012)
      Extremal but non-supersymmetric 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 near-horizon or NHEK region with an enhanced ...
    • The Einstein and the Navier-Stokes Equations: Connecting the Two 

      Bredberg, Irene (2013-02-22)
      This thesis establishes a precise mathematical connection between the Einstein equations of general relativity and the incompressible Navier-Stokes 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 extreme-mass-ratio-inspirals 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.
    • Force-free electrodynamics around extreme Kerr black holes 

      Lupsasca, Alexandru Victor; Rodriguez, Maria; Strominger, Andrew E. (Springer Science + Business Media, 2014)
      Plasma-filled 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 Navier-Stokes to Einstein 

      Bredberg, Irene; Keeler, Cynthia; Lysov, Vyacheslav; Strominger, Andrew E. (Springer-Verlag, 2012)
      We show by explicit construction that for every solution of the incompressible Navier-Stokes equation in \(p + 1\) dimensions, there is a uniquely associated “dual” solution of the vacuum Einstein equations in \(p + 2\) ...
    • From Petrov-Einstein to Navier-Stokes 

      Lysov, Vyacheslav (2014-06-06)
      The fluid/gravity correspondence relates solutions of the incompressible Navier-Stokes equation to metrics which solve the Einstein equations. We propose propose two possible approaches to establish this correspondence: ...