Results 1  10
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133
Large N field theories, string theory and gravity
, 2001
"... We review the holographic correspondence between field theories and string/M theory, focusing on the relation between compactifications of string/M theory on Antide Sitter spaces and conformal field theories. We review the background for this correspondence and discuss its motivations and the evide ..."
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Cited by 1443 (45 self)
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We review the holographic correspondence between field theories and string/M theory, focusing on the relation between compactifications of string/M theory on Antide Sitter spaces and conformal field theories. We review the background for this correspondence and discuss its motivations and the evidence for its correctness. We describe the main results that have been derived from the correspondence in the regime that the field theory is approximated by classical or semiclassical gravity. We focus on the case of the N = 4 supersymmetric gauge theory in four dimensions, but we discuss also field theories in other dimensions, conformal and nonconformal, with or without supersymmetry, and in particular the relation to QCD. We also discuss some implications for black hole physics.
From AdS/CFT correspondence to hydrodynamics
 J. High Energy Phys
"... hepth/0210220 ..."
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The AdS/CFT Correspondence and a New Positive Energy Conjecture for General Relativity
, 1998
"... We examine the AdS/CFT correspondence when the gauge theory is considered on a compactified space with supersymmetry breaking boundary conditions. We find that the corresponding supergravity solution has a negative energy, in agreement with the expected negative Casimir energy in the field theory. S ..."
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Cited by 115 (12 self)
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We examine the AdS/CFT correspondence when the gauge theory is considered on a compactified space with supersymmetry breaking boundary conditions. We find that the corresponding supergravity solution has a negative energy, in agreement with the expected negative Casimir energy in the field theory. Stability of the gauge theory would imply that this supergravity solution has minimum energy among all solutions with the same boundary conditions. Hence we are lead to conjecture a new positive energy theorem for asymptotically locally Antide Sitter spacetimes. We show that the candidate minimum energy solution is stable against all quadratic fluctuations of the metric.
Curvature singularities: The good, the bad, and the naked
 Adv. Theor. Math. Phys
, 2002
"... Necessary conditions are proposed for the admissibility of singular classical solutions with 3 + 1dimensional Poincaré invariance to fivedimensional gravity coupled to scalars. Finite temperature considerations and examples from AdS/CFT support the conjecture that the scalar potential must remain ..."
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Cited by 99 (7 self)
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Necessary conditions are proposed for the admissibility of singular classical solutions with 3 + 1dimensional Poincaré invariance to fivedimensional gravity coupled to scalars. Finite temperature considerations and examples from AdS/CFT support the conjecture that the scalar potential must remain bounded above for a solution to be physical. Having imposed some restrictions on naked singularities allows us to comment on a recent proposal for solving the cosmological constant problem. In AdS/CFT [1, 2, 3] (see [4] for a review), bulk geometries which are only asymptotically AdS5 near the timelike boundary are dual to relevant deformations of the CFT or to nonconformal vacua. Far from the timelike boundary, various singularities might arise. There must be some restrictions on the type of singularity which is allowed: for
The library of Babel: On the Origin of Gravitational Thermodynamics
"... We show that heavy pure states of gravity can appear to be mixed states to almost all probes. For AdS5 Schwarzschild black holes, our arguments are made using the field theory dual to string theory in such spacetimes. Our results follow from applying information theoretic notions to field theory ope ..."
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Cited by 86 (17 self)
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We show that heavy pure states of gravity can appear to be mixed states to almost all probes. For AdS5 Schwarzschild black holes, our arguments are made using the field theory dual to string theory in such spacetimes. Our results follow from applying information theoretic notions to field theory operators capable of describing very heavy states in gravity. For halfBPS states of the theory which are incipient black holes, our account is exact: typical microstates are described in gravity by a spacetime “foam”, the precise details of which are almost invisible to almost all probes. We show that universal lowenergy effective description of a foam of given global charges is via certain singular spacetime geometries. When one of the specified charges is the number of Dbranes, the effective singular geometry is the halfBPS “superstar”. We propose this as the general mechanism by which the effective thermodynamic character of gravity emerges.
Supergravity and spacetime noncommutative open string theory
"... We study the noncritical spacetime noncommutative open string (NCOS) theory using a dual supergravity description in terms of a certain nearhorizon limit of the F1Dp bound state. We find the thermodynamics of NCOS theory from supergravity. The thermodynamics is equivalent to YangMills theory o ..."
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Cited by 63 (5 self)
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We study the noncritical spacetime noncommutative open string (NCOS) theory using a dual supergravity description in terms of a certain nearhorizon limit of the F1Dp bound state. We find the thermodynamics of NCOS theory from supergravity. The thermodynamics is equivalent to YangMills theory on a commutative spacetime. We argue that this fact does not have to be in contradiction with the expected Hagedorn behaviour of NCOS theory. To support this we consider string corrections to the thermodynamics. We also discuss the relation to Little String Theory in 6 dimensions. 1
Dielectric branes
 JHEP
, 1999
"... Preprint typeset in JHEP style PAPER VERSION ..."
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New Effects in Gauge Theory from ppwave Superstrings,” hepth/0206221
"... It has recently been observed that IIB string theory in the ppwave background can be used to calculate certain quantities, such as the dimensions of BMN operators, as exact functions of the effective coupling λ ′ = λ/J2. These functions interpolate smoothly between the weak and strong effective co ..."
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Cited by 59 (7 self)
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It has recently been observed that IIB string theory in the ppwave background can be used to calculate certain quantities, such as the dimensions of BMN operators, as exact functions of the effective coupling λ ′ = λ/J2. These functions interpolate smoothly between the weak and strong effective coupling regimes of N = 4 SYM theory at large R charge J. In this paper we use the ppwave superstring field theory of hepth/0204146 to study more complicated observables. The expansion of the threestring interaction vertex suggests more complicated interpolating functions which in general give rise to fractional powers of λ ′ in physical observables at weak effective coupling. Contents
Starinets, “Minkowskispace correlators in AdS/CFT correspondence: Recipe and applications
, 2002
"... Abstract: We formulate a prescription for computing Minkowskispace correlators from AdS/CFT correspondence. This prescription is shown to give the correct retarded propagators at zero temperature in four dimensions, as well as at finite temperature in the twodimensional conformal field theory dual ..."
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Cited by 48 (4 self)
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Abstract: We formulate a prescription for computing Minkowskispace correlators from AdS/CFT correspondence. This prescription is shown to give the correct retarded propagators at zero temperature in four dimensions, as well as at finite temperature in the twodimensional conformal field theory dual to the BTZ black hole. Using the prescription, we calculate the ChernSimons diffusion constant of the finitetemperature N = 4 supersymmetric YangMills theory in the strong coupling limit. We explain why the quasinormal frequencies of the asymptotically AdS background correspond to the poles of the retarded Green’s function of the boundary conformal field theory.