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PP Wave Limit and Enhanced Supersymmetry in Gauge Theories
, 2008
"... We observe that the pp wave limit of AdS5 × M 5 compactifications of type IIB string theory is universal, and maximally supersymmetric, as long as M 5 is smooth and preserves some supersymmetry. We investigate a specific case, M 5 = T 1,1. The dual N = 1 SCFT, describing D3branes at a conifold sing ..."
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We observe that the pp wave limit of AdS5 × M 5 compactifications of type IIB string theory is universal, and maximally supersymmetric, as long as M 5 is smooth and preserves some supersymmetry. We investigate a specific case, M 5 = T 1,1. The dual N = 1 SCFT, describing D3branes at a conifold
The large N limit of superconformal field theories and supergravity
, 1998
"... We show that the large N limit of certain conformal field theories in various dimensions include in their Hilbert space a sector describing supergravity on the product of AntideSitter spacetimes, spheres and other compact manifolds. This is shown by taking some branes in the full M/string theory and ..."
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Cited by 5673 (21 self)
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and then taking a low energy limit where the field theory on the brane decouples from the bulk. We observe that, in this limit, we can still trust the near horizon geometry for large N. The enhanced supersymmetries of the near horizon geometry correspond to the extra supersymmetry generators present
Superstring vacua of 4dimensional ppwaves with enhanced supersymmetry
 JHEP
"... We study the superstring vacua constructed from the conformal field theories of the type H4 × M, where H4 denotes the super NappiWitten model (super WZW model on the 4dimensional Heisenberg group H4) and M denotes an arbitrary N = 2 rational superconformal field theory with c = 9. We define (type ..."
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Cited by 4 (3 self)
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We study the superstring vacua constructed from the conformal field theories of the type H4 × M, where H4 denotes the super NappiWitten model (super WZW model on the 4dimensional Heisenberg group H4) and M denotes an arbitrary N = 2 rational superconformal field theory with c = 9. We define (type II) superstring vacua with 8 supercharges, which are twice as many as those on the backgrounds of H4 × CY3. We explicitly construct as physical vertices the spacetime SUSY algebra that is a natural extension of H4 Lie algebra. The spectrum of physical states is classified into two sectors: (1) strings freely propagating along the transverse plane of ppwave geometry and possessing the integral U(1)Rcharges in M sector, and (2) strings that do not freely propagate along the transverse plane and possess the fractional U(1)Rcharges in M. The former behaves like the string excitations in the usual CalabiYau compactification, but the latter defines new sectors without changing the physics in “bulk ” space. We also analyze the thermal partition functions of these systems, emphasizing the similarity to the DLCQ string theory. As a byproduct we prove the supersymmetric cancellation of conformal blocks in an arbitrary unitary N = 2 SCFT of c = 12 with the suitable GSO projection. 1
Hierarchies from Fluxes in String Compactifications
, 2002
"... Warped compactifications with significant warping provide one of the few known mechanisms for naturally generating large hierarchies of physical scales. We demonstrate that this mechanism is realizable in string theory, and give examples involving orientifold compactifications of IIB string theory a ..."
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Cited by 724 (33 self)
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Warped compactifications with significant warping provide one of the few known mechanisms for naturally generating large hierarchies of physical scales. We demonstrate that this mechanism is realizable in string theory, and give examples involving orientifold compactifications of IIB string theory and Ftheory compactifications on CalabiYau fourfolds. In each case, the hierarchy of scales is fixed by a choice of RR and NS fluxes in the compact manifold. Our solutions involve compactifications of the KlebanovStrassler gravity dual to a confining N = 1 supersymmetric gauge theory, and the hierarchy reflects the small scale of chiral symmetry breaking in the dual gauge theory.
A Supersymmetry Primer
, 2011
"... I provide a pedagogical introduction to supersymmetry. The level of discussion is aimed at readers who are familiar with the Standard Model and quantum field theory, but who have had little or no prior exposure to supersymmetry. Topics covered include: motivations for supersymmetry, the construction ..."
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Cited by 232 (2 self)
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I provide a pedagogical introduction to supersymmetry. The level of discussion is aimed at readers who are familiar with the Standard Model and quantum field theory, but who have had little or no prior exposure to supersymmetry. Topics covered include: motivations for supersymmetry
Supersymmetry and . . .
, 2005
"... We describe the construction of a Lie superalgebra associated to an arbitrary supersymmetric Mtheory background, and discuss some examples. We prove that for backgrounds with more than 24 supercharges, the bosonic subalgebra acts locally transitively. In particular, we prove that backgrounds with ..."
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Cited by 1 (0 self)
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with more than 24 supersymmetries are necessarily (locally) homogeneous. Furthermore we provide evidence that 24 is the minimal number of supersymmetries which guarantees this.
A new maximally supersymmetric background of IIB superstring theory
 JHEP
, 2002
"... Abstract. We present a maximally supersymmetric IIB string background. The geometry is that of a conformally flat lorentzian symmetric space G/K with solvable G, with a homogeneous fiveform flux. We give the explicit supergravity solution, compute the isometries, the 32 Killing spinors, and the symm ..."
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Cited by 404 (26 self)
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Abstract. We present a maximally supersymmetric IIB string background. The geometry is that of a conformally flat lorentzian symmetric space G/K with solvable G, with a homogeneous fiveform flux. We give the explicit supergravity solution, compute the isometries, the 32 Killing spinors, and the symmetry superalgebra, and then discuss Tduality and the relation to Mtheory. Contents
Results 1  10
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15,359