Results 1  10
of
36
Ten–dimensional supergravity constraints from the pure spinor formalism for the superstring,” Nucl. Phys. B635
, 2002
"... It has recently been shown that the tendimensional superstring can be quantized using the BRST operator Q = ∮ λ α dα where λ α is a pure spinor satisfying λγ m λ = 0 and dα is the fermionic supersymmetric derivative. In this paper, the pure spinor version of superstring theory is formulated in a c ..."
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It has recently been shown that the tendimensional superstring can be quantized using the BRST operator Q = ∮ λ α dα where λ α is a pure spinor satisfying λγ m λ = 0 and dα is the fermionic supersymmetric derivative. In this paper, the pure spinor version of superstring theory is formulated in a curved supergravity background and it is shown that nilpotency and holomorphicity of the pure spinor BRST operator imply the onshell superspace constraints of the supergravity background. This is shown to lowest order in α ′ for the heterotic and Type II superstrings, thus providing a compact pure spinor version of the tendimensional superspace constraints for N = 1, Type IIA and Type IIB supergravities. Since quantization is straightforward using the pure spinor version of the superstring, it is expected that these methods can also For many purposes, superstring theory is most conveniently expressed as an effective field theory of its massless modes consisting of supergravity theory together with corrections arising order by order in α ′. In principle these higher order corrections can be obtained by computing scattering amplitudes or by demanding consistency of the superstring sigma model in a curved
A new hat for the c = 1 matrix model
"... We consider two dimensional supergravity coupled to ĉ = 1 matter. This system can also be interpreted as noncritical type 0 string theory in a two dimensional target space. After reviewing and extending the traditional descriptions of this class of theories, we provide a matrix model description. Th ..."
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We consider two dimensional supergravity coupled to ĉ = 1 matter. This system can also be interpreted as noncritical type 0 string theory in a two dimensional target space. After reviewing and extending the traditional descriptions of this class of theories, we provide a matrix model description. The 0B theory is similar to the realization of two dimensional bosonic string theory via matrix quantum mechanics in an inverted harmonic oscillator potential; the difference is that we expand around a nonperturbatively stable vacuum, where the matrix eigenvalues are equally distributed on both sides of the potential. The 0A theory is described by a quiver matrix model. July
Boundary counterterms and the thermodynamics of 2D black holes,” arXiv:hepth/0411121
"... We utilize a novel method to study the thermodynamics of two dimensional type 0A black holes with constant RR flux. Our approach is based on the HamiltonJacobi method of deriving boundary counterterms. We demonstrate this approach by recovering the standard results for a well understood example, Wi ..."
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Cited by 15 (3 self)
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We utilize a novel method to study the thermodynamics of two dimensional type 0A black holes with constant RR flux. Our approach is based on the HamiltonJacobi method of deriving boundary counterterms. We demonstrate this approach by recovering the standard results for a well understood example, Witten’s black hole. Between this example and the 0A black hole we find universal expressions for the entropy and black hole mass, as well as the infrared divergence of the partition function. As a nontrivial check of our results we verify the first law of thermodynamics for these systems. Our results for the mass disagree with the predictions of a proposed matrix model dual of the 0A black hole.
Thermodynamics of Black Holes in Two (and Higher) Dimensions
, 2007
"... A comprehensive treatment of black hole thermodynamics in twodimensional dilaton gravity is presented. We derive an improved action for these theories and construct the Euclidean path integral. An essentially unique boundary counterterm renders the improved action finite onshell, and its variati ..."
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Cited by 13 (6 self)
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A comprehensive treatment of black hole thermodynamics in twodimensional dilaton gravity is presented. We derive an improved action for these theories and construct the Euclidean path integral. An essentially unique boundary counterterm renders the improved action finite onshell, and its variational properties guarantee that the path integral has a welldefined semiclassical limit. We give a detailed discussion of the canonical ensemble described by the Euclidean partition function, and examine various issues related to stability. Numerous examples are provided, including black hole backgrounds that appear in two dimensional solutions of string theory. We show that the Exact String Black Hole is one of the rare cases that admits a consistent thermodynamics without the need for an external thermal reservoir. Our approach can also be applied to certain higherdimensional black holes, such as SchwarzschildAdS, ReissnerNordström, and BTZ.
Hybrid Formalism, Supersymmetry Reduction, and Ramondramond Fluxes
, 2006
"... The supersymmetric hybrid formalism for Type II strings is used to study partial supersymmetry breaking in four and three dimensions. We use worldsheet techniques to derive effects of internal RamondRamond fluxes such as torsions, superpotentials and warping. ..."
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Cited by 7 (2 self)
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The supersymmetric hybrid formalism for Type II strings is used to study partial supersymmetry breaking in four and three dimensions. We use worldsheet techniques to derive effects of internal RamondRamond fluxes such as torsions, superpotentials and warping.
Scattered Results in 2D String Theory
, 2004
"... The nonperturbative 1 → N tachyon scattering amplitude in 2D type 0A string theory is computed. The probability that N particles are produced is a monotonically decreasing function of N whenever N is large enough that statistical methods apply. The results are compared with expectations from black h ..."
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Cited by 7 (1 self)
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The nonperturbative 1 → N tachyon scattering amplitude in 2D type 0A string theory is computed. The probability that N particles are produced is a monotonically decreasing function of N whenever N is large enough that statistical methods apply. The results are compared with expectations from black hole thermodynamics.
Flux backgrounds in 2D string theory
 JHEP 0403, 017 (2004) [arXiv:hepth/0312208]; T. Takayanagi, “Comments on 2D type IIA string and matrix model,” JHEP 0411, 030
, 2004
"... We study RR flux backgrounds in two dimensional type 0 string theories. In particular, we study the relation between the 0A matrix model and the extremal black hole in two dimensions. Using Tduality we find a dual flux background in type 0B theory and propose its matrix model description. When the ..."
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We study RR flux backgrounds in two dimensional type 0 string theories. In particular, we study the relation between the 0A matrix model and the extremal black hole in two dimensions. Using Tduality we find a dual flux background in type 0B theory and propose its matrix model description. When the Fermi level µ is set to zero this system remains weakly coupled and exhibits a larger symmetry related to the structure of flux vacua. Finally, we construct a two dimensional type IIB background as an orbifold of the 0B background. December
The conformal limit of the 0A matrix model and string theory on
 AdS(2),” JHEP 0511 (2005) 052 [arXiv:hepth/0509221
"... Abstract: We analyze the conformal limit of the matrix model describing flux backgrounds of two dimensional type 0A string theory. This limit is believed to be dual to an AdS2 background of type 0A string theory. We show that the spectrum of this limit is identical to that of a free fermion on AdS2, ..."
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Abstract: We analyze the conformal limit of the matrix model describing flux backgrounds of two dimensional type 0A string theory. This limit is believed to be dual to an AdS2 background of type 0A string theory. We show that the spectrum of this limit is identical to that of a free fermion on AdS2, suggesting that there are no closed string excitations in this background. – 1 –
Quantum quench in matrix models: Dynamical phase transitions, Selective equilibration and the Generalized Gibbs Ensemble
, 2013
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Black Hole Partition Function using Hybrid Formalism of Superstrings
, 811
"... The hybrid formalism of superstrings on AdS2 × S 2, defined as a sigma model on the coset supermanifold PSU(1,12)/U(1) × U(1) with a WZ term, is used to calculate the instanton partition function of IIA superstrings on the euclidean attractor geometry AdS2 × S 2 × CY3. A nilpotent BRST operator is ..."
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The hybrid formalism of superstrings on AdS2 × S 2, defined as a sigma model on the coset supermanifold PSU(1,12)/U(1) × U(1) with a WZ term, is used to calculate the instanton partition function of IIA superstrings on the euclidean attractor geometry AdS2 × S 2 × CY3. A nilpotent BRST operator is constructed and the sigma model action is shown to be closed. The BRST operator is then used to regularize the divergence over the AdS2 part and the In [1], OSV conjectured a relationship of the form: ZBH = Ztop  2 (1)