Zobrazeno 1 - 10
of 222
pro vyhledávání: '"Medved, A. J. M."'
The frozen star model describes a type of black hole mimicker; that is, a regular, horizonless, ultracompact object that behaves just like a Schwarzschild black hole from an external-observer's perspective. In particular, the frozen star is bald, mea
Externí odkaz:
http://arxiv.org/abs/2410.00493
We present rotating solutions of Einstein's gravity coupled to an effective Born-Infeld theory that describes the end of open-string tachyon condensation after the decay of an unstable $D$-brane or a brane-antibrane system. The geometry of these solu
Externí odkaz:
http://arxiv.org/abs/2409.06454
Autor:
Brustein, Ram, Medved, A. J. M.
The frozen star is a non-singular, ultracompact object that, to an external observer, looks exactly like a Schwarzschild black hole, but with a different interior geometry and matter composition. The frozen star needs to be sourced by an extremely an
Externí odkaz:
http://arxiv.org/abs/2404.15985
Autor:
Brustein, Ram, Medved, A. J. M.
The Kerr metric is a vacuum solution of the Einstein equations outside of a rotating black hole, but what interior matter is actually rotating and sourcing the Kerr geometry? Here, we describe a rotating exotic matter which can source the Kerr geomet
Externí odkaz:
http://arxiv.org/abs/2310.16467
The frozen star is a recent proposal for a non-singular solution of Einstein's equations that describes an ultracompact object which closely resembles a black hole from an external perspective. The frozen star is also meant to be an alternative, clas
Externí odkaz:
http://arxiv.org/abs/2310.11572
The frozen star model provides a classical description of a regularized black hole and is based upon the idea that regularizing the singularity requires deviations from the Schwarzschild geometry which extend over horizon-sized scales, as well as max
Externí odkaz:
http://arxiv.org/abs/2304.04984
We have proposed a model geometry for the interior of a regular black hole mimicker, the frozen star, whose most startling feature is that each spherical shell in its interior is a surface of infinite redshift. The geometry is a solution of the Einst
Externí odkaz:
http://arxiv.org/abs/2301.09712
We have recently proposed a model for a regular black hole, or an ultra-compact object, that is premised on having maximally negative radial pressure throughout the entirety of the object's interior. This model can be viewed as that of a highly entro
Externí odkaz:
http://arxiv.org/abs/2109.10017
Autor:
Brustein, Ram, Medved, A. J. M.
Publikováno v:
Phys. Rev. D 102, 086002 (2020)
A correspondence between closed strings in their high-temperature Hagedorn phase and asymptotically de Sitter (dS) space is established. We identify a thermal, conformal field theory (CFT) whose partition function is, on the one hand, equal to the pa
Externí odkaz:
http://arxiv.org/abs/2005.09321
Autor:
Brustein, Ram, Medved, A. J. M.
Publikováno v:
Phys. Rev. D 101, 123502 (2020)
We propose that the initial state of the Universe was an isotropic state of maximal entropy. Such a state can be described in terms of a state of closed, interacting, fundamental strings in their high-temperature Hagedorn phase. The entropy density i
Externí odkaz:
http://arxiv.org/abs/1906.00989