264 citations · 1k across the 16 of their papers we have counts for
13 papers · 1 filter
Instability in near-horizon geometries of even-dimensional Myers-Perry black holes
Norihiro Tanahashi, Keiju Murata
We study the gravitational, electromagnetic and scalar field perturbations on the near-horizon geometries of the even-dimensional extremal Myers-Perry black holes. By dimensional r…
Central Charges in Extreme Black Hole/CFT Correspondence
Geoffrey Compère, Keiju Murata, Tatsuma Nishioka
The Kerr/CFT correspondence has been recently broadened to the general extremal black holes under the assumption that the central charges from the non-gravitational fields vanish.…
Warped AdS_5 Black Holes and Dual CFTs
Keiju Murata, Tatsuma Nishioka, Norihiro Tanahashi
We consider a black hole solution whose spatial boundary is a squashed three sphere in Einstein gravity with negative cosmological constant. We solve the Einstein equations numeric…
Instabilities of Kerr-AdS_5 x S^5 Spacetime
Keiju Murata
We study gravitational perturbations of the Kerr-AdS_5 x S^5 spacetime with equal angular momenta. In this spacetime, we found the two kinds of classical instabilities, superradian…
CFT Duals for Extreme Black Holes
Thomas Hartman, Keiju Murata, Tatsuma Nishioka +1
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…
Looking at the Gregory-Laflamme instability through quasi-normal modes
R. A. Konoplya, Keiju Murata, Jiro Soda +1
We study evolution of gravitational perturbations of black strings. It is well known that for all wavenumber less than some threshold value, the black string is unstable against sc…