string theory, black hole singularity

In the context of string theory the information paradox problem arising from Hawking's Black holes are no longer the stuff of science fiction ... Hobart. The geometry of the space of equilibrium states is curved, but we show that the thermodynamic curvature does not diverge at the phase transition point expected when the black hole . The event horizon contains the quantum field information which composes the black hole. Black holes may not exist, but fuzzballs might, wild ... An exact conformal field theory describing a black hole in two-dimensional space-time is found as an SL(2,openR)/U(1) gauged Wess-Zumino-Witten model. "The questions about black holes being studied here have nothing to do with currently feasible astrophysical measurements" - Woit. The possibility that the Big Bang is actually a white hole remains. The explanation, cast in a deductive form by including the "therefore" line after the premises, is: But, quantum field theory does not include gravitational effects, which is the main feature of a black hole. String theory. Solution of the Singularity Problem of Black Hole! Lead researcher Robert Mann said: «The basic idea was that maybe the singularity of the universe is like the singularity at the center of a black hole. The distribution of energy can't be reduced to at least radius R_gs(0.3R_S). Particularly, the problematic existence of curvature singularities in generic solutions of classical gravity and the black hole information paradox are reviewed. A point where the mathematical equations of the theory break down and can't be used to make meaningful predictions. For k=9/4, the conformal field theory can be regarded as a classical solution of the same system that is probed in the c=1 matrix model. The Schwarzschild AdS solution with m 0 has a timelike curvature singularity. Black holes and the singularity | Physics Forums [2006.13249] $T\bar T$, Black Holes and Negative Strings Black holes are monstrous celestial entities exerting gravitational fields so vicious that no matter or light can escape. We present a study of the physics of a black hole using a quantum field theory frame based on the WZW model in a suitable mathematical frame. To an outside observer the string and all the information it . Instead, the best metaphor to explain what a fuzzball is to look at another compact-and-weird object in the universe: neutron stars . This immediately raised a challenge to potential quantum gravity theories: give a statistical mechanical derivation . The theory of black holes essentially follows in arbitrary dimensions. Thus, the singularity theorem does not hold in string theory. A spinning black hole is described by the 'Kerr In string theory, black holes are neither black nor holes. In order to construct a massless object, we choose the . String theory . A gravitational singularity, spacetime singularity or simply singularity is a condition in which gravity is so intense that spacetime itself breaks down catastrophically. Neutron stars are what happens when an object doesn't quite have enough gravity to compress into what we call a black hole. In a paper written in 1939, Albert Einstein attempted to reject the notion of black holes that his theory of general relativity and gravity, published more than two decades earlier, seemed to predict. For one sign of the coupling, it leads to an asymptotically linear dilaton spacetime, and a corresponding Hagedorn spectrum. Einstein-Gauss-Bonnet theory is a string-generated gravity theory when approaching the low energy limit. Physics near any Black Hole singularity most likely falls outside the domain of validity of quantum field theory and statistical mechanics, as we know them. The Schwarzschild black hole forms a point singularity in spacetime - although, as we will see, one can in theory open this up to give a wormhole (albeit this seems unlikely in practise). String theory on AdS3 has a solvable single-trace irrelevant deformation that is closely related to T T ¯ $$ T\\overline{T} $$ . In this work, we investigate the evaporation of the static spherically symmetric neutral AdS black holes in Einstein-Gauss-Bonnet gravity in various spacetime . For k=9/4, the conformal field theory can be regarded as a classical solution of the same system that is probed in the c=1 matrix model. So this cannot describe--so this does not describe a real black hole, but it's a good approximation to the real life black hole after this object have stabilized. So this is a mathematical--in some sense, it is a mathematical idealization of real life black hole. Maybe not: The left black hole is according to Einstein's theory of gravity. For the case the bulk theory lives in 5 dimensions the dual theory is an SU(N) Yang-Mills theory on a In theory, not . A spacetime singularity is a breakdown in spacetime, either in its geometry or in some other basic physical structure. F = the property of being a black hole singularity in M2. Particularly, the problematic existence of curvature singularities in generic solutions of classical gravity and the black hole information paradox are reviewed. The nonexistence of d = 3 black holes implies that black string solutions do not exist in our own d = 4 universe. "We hope to understand the singularity inside the black hole," says Maldacena. Black Hole Singularities Are as Inescapable as Expected. Many physicists will tell you that the best way to fix broken physics is with string. A black hole, for us, is a 3-D space, but String Theory refers to them as a "unwrapped brane configuration.". String theory provides an example of the kind of apparent inconsistency that the [ital principle] [ital of] [ital black] [ital hole] [ital complementarity] deals with. 1. @article{osti_5730868, title = {String theory and black holes}, author = {Witten, E}, abstractNote = {An exact conformal field theory describing a black hole in two-dimensional space-time is found as an SL(2,{ital openR})/U(1) gauged Wess-Zumino-Witten model. The conformal field theory governing the space-time is regular at the Riemannian singularity, but it appears . First published Mon Jun 29, 2009; substantive revision Wed Feb 27, 2019. • They carry a charge, and there is no force between two D-branes. Singularities and Black Holes. There is a sense in which a black hole singularity is not a thing at all, and has no definable characteristics; section 7.4. . This paradox may well have a solution in string theory, either in the string theory analyses described in the previous section or in the holographic principle. And to get that, you need to go to the center of a black hole: . Lecture 1: General Aspects of Black Holes Motivation Studying black holes in string theory is important as a fundamental probe of string theory. He shows that a black hole has a nonzero temperature to an observer at infinity. String theory and spacetime singularities It is generally believed that understanding spacetime singularities requires a quantum theory of gravity. In string theory, black holes are neither black nor holes. For one sign of the coupling, it leads to an asymptotically linear dilaton spacetime, and a corresponding Hagedorn spectrum. The t c singularity persists to all orders in the 1/m expansion, for finite α′, and to all orders in g s. Certain leading nonperturbative effects can also be studied. The discovery of ring-shaped black holes in five dimensions led researchers to hypothesise that they could break up and give rise to a naked singularity. There are no models in which a black hole contains a traversable wormhole. origin of black hole entropy in string theory. μ > 0: black hole with spacelike singularity-1/4 < μ <0: black hole with timelike singularity μ < -1/4: naked singularity . "The essential result of this investigation . It studies the 'dragon' parts of the black holes. This does not imply that string theory should resolve all singularities. Loop quantum cosmology (LQC) has in recent years led to successful resolution of singularities in cosmological models while agreeing with general relativity in low curvature limit. Hawking had said that if an object falls into a black […] String theory, in fact. March 5, 2002 • Phys. So my interpritation of this is that a brane is wrapped around the little thing in a . Since its formulation in 1916, Einstein's theory of general relativity has repeatedly surprised and confounded physicists. The M5-brane violates the (Incidentally, there have been known special black hole solutions without singularities by violating the assumptions other than (i). Twenty years on, string theory continues to inspire this shared language between arguing parents of physics, in the form of anti-de Sitter space/conformal field theory, or AdS/CFT correspondence. They are paradoxical because they simultaneously must exist but can't, and so they break physics as we know it. Unformatted text preview: SU-ITP-94-1 January 1994 hep-th/9401076 Black Hole Entropy in Canonical Quantum Gravity and Superstring Theory ?Leonard Susskind and John Uglum y Department of Physics Stanford University, Stanford, CA 94305-4060 ABSTRACT In this paper the entropy of an eternal Schwarzschild black hole is studied in the limit of in nite black hole mass. What the Cambridge researchers, along with . Nop =nr. String theory on AdS 3 has a solvable single-trace irrelevant deformation that is closely related to T T ̄. For {ital k}=9/4, the conformal field theory can be regarded as a classical solution of the same system that is probed in the {ital c}=1 . By introducing the higher order curvature terms, this theory is supposed to help to solve the black hole singularity problem. We also find a UV/UV connection that governs physics inside the horizon. In theory, not even light can escape from a black hole. The resulting quantum space-times resolve the singularity present in the classical theory inside black holes. Later today — at 7 PM EDT / 4 PM PDT — Perimeter Institute, as part of their lecture series, will be broadcasting the talk of Dr. Amanda Peet on the topic of String Theory Legos For Black Holes. Mathur's calculations show that when black holes are modeled in string theory, the singularity disappears — a comforting realization for physicists who have a strong distaste for any infinite quantity. These massless black holes exist individually in spacetime, different from the known massless solutions, which come in pairs with opposite signs for their masses. G = the property of being both a black hole singularity in M2 and a big bang singularity of a universe that contains an electomagentic force with the value 1/137. String theory offers a framework to eliminate the event horizon and infinitely dense singularity, the two most troubling aspects of classical black holes for the information paradox. In string theory, black holes are neither black nor holes. The paradigm of string theory and, especially, its low-energy limit, supergravity, is used throughout as a tool for understanding these problems. . What does string theory have to say about black holes? One hopes that string theory will lead to a detailed theory of the Big Bang which in turns leads to The appearance of a black hole singularity in general relativity simply indicates that general relativity is inaccurate at very small sizes, which we already knew.

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