Browsing by Author "Song, Wei"
Now showing items 18 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 nearextreme 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 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 ... 
Holographic Derivation of KerrNewman Scattering Amplitudes for General Charge and Spin
Hartman, Thomas; Song, Wei; Strominger, Andrew E. (Springer, 2010)Nearsuperradiant scattering of charged scalars and fermions by a nearextreme KerrNewman black hole and photons and gravitons by a nearextreme 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 rightmoving U(1) KacMoodyVirasoro algebra with \(c_R=\frac{3ℓ}{2G}\). ... 
Warped \(AdS_3\)/DipoleCFT Duality
Song, Wei; Strominger, Andrew E. (SpringerVerlag, 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 ...