Now showing items 1-8 of 8

    • 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. ...
    • 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 ...
    • Holographic Derivation of Kerr-Newman Scattering Amplitudes for General Charge and Spin 

      Hartman, Thomas; Song, Wei; Strominger, Andrew E. (Springer, 2010)
      Near-superradiant scattering of charged scalars and fermions by a near-extreme Kerr-Newman black hole and photons and gravitons by a near-extreme Kerr black hole are computed as certain Fourier transforms of correlators ...
    • The Kerr/CFT Correspondence 

      Guica, Monica; Hartman, Thomas; Song, Wei; Strominger, Andrew E. (American Physical Society, 2009)
      Quantum gravity in the region very near the horizon of an extreme Kerr black hole (whose angular momentum and mass are related by \(J = GM^2\)) is considered. It is shown that consistent boundary conditions exist, for which ...
    • New Boundary Conditions for \(AdS_3\) 

      Compère, Geoffrey; Song, Wei; Strominger, Andrew E. (Springer Science + Business Media, 2013)
      New chiral boundary conditions are found for quantum gravity with matter on \(AdS_3\). The associated asymptotic symmetry group is generated by a single right-moving U(1) Kac-Moody-Virasoro algebra with \(c_R=\frac{3ℓ}{2G}\). ...
    • Warped \(AdS_3\)/Dipole-CFT Duality 

      Song, Wei; Strominger, Andrew E. (Springer-Verlag, 2012)
      String theory contains solutions with \(SL(2, \mathbb{R})_R \times U(1)_L\)-invariant warped \(AdS_3\) \((WAdS_3)\) factors arising as continuous deformations of ordinary \(AdS_3\) factors. We propose that some of these ...