Results 31 to 40 of about 95,179 (254)

An entropy current for dynamical black holes in four-derivative theories of gravity

open access: yesJournal of High Energy Physics, 2020
We propose an entropy current for dynamical black holes in a theory with arbitrary four derivative corrections to Einstein’s gravity, linearized around a stationary black hole.
Jyotirmoy Bhattacharya   +3 more
doaj   +1 more source

Gravitational footprints of black holes and their microstate geometries

open access: yesJournal of High Energy Physics, 2021
We construct a family of non-supersymmetric extremal black holes and their horizonless microstate geometries in four dimensions. The black holes can have finite angular momentum and an arbitrary charge-to-mass ratio, unlike their supersymmetric cousins ...
Ibrahima Bah   +4 more
doaj   +1 more source

Black holes lessons from multipole ratios

open access: yesJournal of High Energy Physics, 2021
We explain in detail how to calculate the gravitational mass and angular momentum multipoles of the most general non-extremal four-dimensional black hole with four magnetic and four electric charges.
Iosif Bena, Daniel R. Mayerson
doaj   +1 more source

Emission of charged particles from four- and five-dimensional black holes [PDF]

open access: yes, 1996
Recently Das and Mathur found that the leading order Hawking emission rate of neutral scalars by near-extremal $D=5$ black holes is exactly reproduced by a string theoretic model involving intersecting D-branes.
Gubser, Steven S., Klebanov, Igor R.
core   +2 more sources

Dyonic black hole in heterotic string theory [PDF]

open access: yesNuclear Physics B, 1997
25 pages, Harvmac, Version to appear in Nucl.
Jatkar, Dileep P.   +2 more
openaire   +3 more sources

Extremal black hole horizons

open access: yesJournal of High Energy Physics, 2018
Using the blackfold effective theory applied to extremal Kerr branes we provide evidence for the existence of new stationary extremal black hole solutions in asymptotically flat spacetime with both single and multiple disconnected horizons. These include
Jay Armas   +2 more
doaj   +1 more source

Fermion perturbations in string theory black holes [PDF]

open access: yesClassical and Quantum Gravity, 2011
In this paper we study fermion perturbations in four dimensional black holes of string theory, obtained either from a non-extreme configuration of three intersecting five-branes with a boost along the common string or from a non-extreme intersecting system of two two-branes and two five-branes.
Piedra, Owen Pavel Fernández   +1 more
openaire   +2 more sources

Geroch group description of bubbling geometries

open access: yesJournal of High Energy Physics, 2018
The Riemann-Hilbert approach to studying solutions of supergravity theories allows us to associate spacetime independent monodromy matrices (matrices in the Geroch group) with solutions that effectively only depend on two spacetime coordinates.
Pratik Roy, Amitabh Virmani
doaj   +1 more source

Islands in Schwarzschild black holes

open access: yesJournal of High Energy Physics, 2020
We study the Page curve for asymptotically flat eternal Schwarzschild black holes in four and higher spacetime dimensions. Before the Page time, the entanglement entropy grows linearly in time.
Koji Hashimoto   +2 more
doaj   +1 more source

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