Results 31 to 40 of about 1,803 (203)

Currents and radiation from the large D black hole membrane

Journal of High Energy Physics, 2017
It has recently been demonstrated that black hole dynamics in a large number of dimensions D reduces to the dynamics of a codimension one membrane propagating in flat space.
Sayantani Bhattacharyya, Anup Kumar Mandal, Mangesh Mandlik, Umang Mehta, Shiraz Minwalla, Utkarsh Sharma, Somyadip Thakur   +6 more
doaj   +1 more source

Probing phase structure of black holes with Lyapunov exponents

Journal of High Energy Physics, 2022
We conjecture that there exists a relationship between Lyapunov exponents and black hole phase transitions. To support our conjecture, Lyapunov exponents of the motion of particles and ring strings are calculated for Reissner-Nordström-AdS black holes ...
Xiaobo Guo, Yuhang Lu, Benrong Mu, Peng Wang   +3 more
doaj   +1 more source

Quantum vacuum effects on the formation of black holes

Journal of High Energy Physics, 2023
We study the backreaction of quantum fields induced through the vacuum polarization and the conformal anomaly on the collapse of a thin shell of dust. It is shown that the final fate of the collapse process depends on the physical properties of the shell,
Moslem Shafiee, Yousef Bahrampour
doaj   +1 more source

Spacetime singularities as sources of a conserved gravitational flux [PDF]

, 1993
Spacetime singularities are regarded as sources or sinks of a conserved gravitational flux. The flux lines are viewed as curves belonging, not to the spacetime manifold M, but to the tangent fibre bundle over M. These lines are determined by timelike and
Lopez,
core   +1 more source

THE NATURE OF SPACETIME SINGULARITIES [PDF]

, 2005
Submitted to 100 Years of Relativity - Space-Time Structure: Einstein and Beyond, A. Ashtekar (ed.)
openaire   +3 more sources

Naked Singularities in the Vaidya Spacetime [PDF]

Progress of Theoretical Physics, 1984
Summary: We investigate the property of a singularity which is formed by the spherical collapse of pure radiation from past null infinity, in terms of the congruence of null geodesics in the Vaidya spacetime. When the initial increase of mass due to the inflow of radiation is not so fast, the so-called shell-focusing singularity appears at the center ...
openaire   +1 more source

Points in general relativistic shock wave interaction are “regularity singularities” where spacetime is not locally flat

, 2011
We show that the regularity of the gravitational metric tensor in spher- ically symmetric spacetimes cannot be lifted from C0,1 to C1,1 within the class of C1,1 coordinate transformations in a neighborhood of a point of shock wave inter- action in ...
Reintjes, Moritz, Temple, Blake
core   +1 more source

Blow-up for solutions of hyperbolic PDE and spacetime singularities [PDF]

, 2000
An important question in mathematical relativity theory is that of the nature of spacetime singularities. The equations of general relativity, the Einstein equations, are essentially hyperbolic in nature and the study of spacetime singularities is ...
Rendall, Alan D., Alan D. Rendall, Rendall, A.   +2 more
core   +1 more source

Black hole thermodynamics with conical defects

Journal of High Energy Physics, 2017
Recently we have shown [1] how to formulate a thermodynamic first law for a single (charged) accelerated black hole in AdS space by fixing the conical deficit angles present in the spacetime.
Michael Appels, Ruth Gregory, David Kubizňák   +2 more
doaj   +1 more source

Gravitational thermodynamics without the conformal factor problem: partition functions and Euclidean saddles from Lorentzian path integrals

Journal of High Energy Physics, 2022
Thermal partition functions for gravitational systems have traditionally been studied using Euclidean path integrals. But in Euclidean signature the gravitational action suffers from the conformal factor problem, which renders the action unbounded below.
Donald Marolf
doaj   +1 more source