Results 1  10
of
19
Dbranes on AdS flux compactifications
, 2007
"... We study Dbranes in N = 1 flux compactifications to AdS4. We derive their supersymmetry conditions and express them in terms of background generalized calibrations. Basically because AdS has a boundary, the analysis of stability is more subtle and qualitatively different from the usual case of Min ..."
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Cited by 5 (4 self)
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We study Dbranes in N = 1 flux compactifications to AdS4. We derive their supersymmetry conditions and express them in terms of background generalized calibrations. Basically because AdS has a boundary, the analysis of stability is more subtle and qualitatively different from the usual case of Minkowski compactifications. For instance, stable Dbranes filling AdS4 may wrap trivial internal cycles. Our analysis gives a geometric realization of the fourdimensional field theory approach of Freedman and collaborators. Furthermore, the onetoone correspondence between the supersymmetry conditions of the background and the existence of generalized calibrations for Dbranes is clarified and extended to any supersymmetric flux background that admits a timelike Killing vector and for which all fields are timeindependent with respect to the associated time. As explicit examples, we discuss supersymmetric Dbranes on IIA nearly Kähler AdS4 flux compactifications.
SUPERCOHERENT STATES OF OSp(8 ∗ 2N), CONFORMAL SUPERFIELDS AND THE AdS7/CFT6 DUALITY
, 2001
"... We study the positive energy unitary representations of 2N extended superconformal algebras OSp(8 ∗ 2N) in six dimensions. These representations can be formulated in a particle basis or a supercoherent state basis, which are labeled by the superspace coordinates in d = 6. We show that the supercohe ..."
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Cited by 4 (1 self)
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We study the positive energy unitary representations of 2N extended superconformal algebras OSp(8 ∗ 2N) in six dimensions. These representations can be formulated in a particle basis or a supercoherent state basis, which are labeled by the superspace coordinates in d = 6. We show that the supercoherent states that form the bases of positive energy representations of OSp(8 ∗ 2N) can be identified with conformal superfields in six dimensions. The massless conformal superfields correspond precisely to the ultra short doubleton supermultiplets of OSp(8 ∗ 2N). The other positive energy unitary representations correspond to massive conformal superfields in six dimensions and they can be obtained by tensoring an arbitrary number of doubleton supermultiplets with each other. The supermultiplets obtained by tensoring two copies of the doubletons correspond to massless antide Sitter supermultiplets in d = 7.
Generalized) conformal quantum mechanics of 0branes and twodimensional dilaton gravity,” hepth/9909180
"... We study the relation between the (generalized) conformal quantum mechanics of 0branes and the twodimensional dilaton gravity. The twodimensional actions obtained from the supergravity effective actions for the (dilatonic) 0branes through the compactification on a sphere are related to known two ..."
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Cited by 4 (2 self)
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We study the relation between the (generalized) conformal quantum mechanics of 0branes and the twodimensional dilaton gravity. The twodimensional actions obtained from the supergravity effective actions for the (dilatonic) 0branes through the compactification on a sphere are related to known twodimensional dilaton gravity models. The SL(2,R) symmetry of the (generalized) conformal quantum mechanics is realized within such twodimensional models. The twodimensional dilatonic gravity model derived from the nondilatonic 0brane action is related to the Liouville theory and therefore is conformal, whereas the twodimensional model derived from the dilatonic 0brane action does not have the conformal symmetry.
Nearhorizon branescan revived
, 804
"... In 1987 two versions of the branescan of Ddimensional super pbranes were put forward. The first pinpointed those (p, D) slots consistent with kappasymmetric GreenSchwarz type actions; the second generalized the membrane at the end of the universe idea to all those superconformal groups describi ..."
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Cited by 1 (0 self)
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In 1987 two versions of the branescan of Ddimensional super pbranes were put forward. The first pinpointed those (p, D) slots consistent with kappasymmetric GreenSchwarz type actions; the second generalized the membrane at the end of the universe idea to all those superconformal groups describing pbranes on the boundary of AdSp+2 ×S D−p−2. Although the second version predicted D3 and M5 branes in addition to those of the first, it came unstuck because the 1/2 BPS solitonic branes failed to exhibit the required symmetry enhancement in the nearhorizon limit, except in the nondilatonic cases (p = 2, D = 11), (p = 3, D = 10) and (p = 5, D = 11). Just recently, however, it has been argued that the fundamental D = 10 heterotic string does indeed display a nearhorizon enhancement to OSp(82) as predicted by the branescan, provided α ′ corrections are taken into account. If this logic could be extended to the other strings and branes, it would resolve this 21yearold paradox and provide a wealth of new AdS/CFT dualities, which we tabulate.
hepth/9903214 Embedding AdS Black Holes in Ten and Eleven Dimensions
, 1999
"... We construct the nonlinear KaluzaKlein ansätze describing the embeddings of the U(1) 3, U(1) 4 and U(1) 2 truncations of D = 5, D = 4 and D = 7 gauged supergravities into the type IIB string and Mtheory. These enable one to oxidise any associated lower dimensional solutions to D = 10 or D = 11. I ..."
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We construct the nonlinear KaluzaKlein ansätze describing the embeddings of the U(1) 3, U(1) 4 and U(1) 2 truncations of D = 5, D = 4 and D = 7 gauged supergravities into the type IIB string and Mtheory. These enable one to oxidise any associated lower dimensional solutions to D = 10 or D = 11. In particular, we use these general ansätze to embed the charged AdS5, AdS4 and AdS7 black hole solutions in ten and eleven dimensions. The charges for the black holes with toroidal horizons may be interpreted as the angular momenta of D3branes, M2branes and M5branes spinning in the transverse dimensions, in their nearhorizon decoupling limits. The horizons of the black holes coincide with the worldvolumes of the branes. The KaluzaKlein ansätze also allow the black holes with spherical or hyperbolic horizons to be reinterpreted in D = 10 or D = 11. 1
Nearhorizon branescan revived
, 804
"... In 1987 two versions of the branescan of Ddimensional super pbranes were put forward. The first pinpointed those (p,D) slots consistent with kappasymmetric GreenSchwarz type actions; the second generalized the membrane at the end of the universe idea to all those superconformal groups describin ..."
Abstract
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In 1987 two versions of the branescan of Ddimensional super pbranes were put forward. The first pinpointed those (p,D) slots consistent with kappasymmetric GreenSchwarz type actions; the second generalized the membrane at the end of the universe idea to all those superconformal groups describing pbranes on the boundary of AdSp+2 ×SD−p−2. Although the second version predicted D3 and M5 branes in addition to those of the first, it came unstuck because the 1/2 BPS solitonic branes failed to exhibit the required symmetry enhancement in the nearhorizon limit, except in the nondilatonic cases (p = 2,D = 11), (p = 3,D = 10) and (p = 5,D = 11). Just recently, however, it has been argued that the fundamental D = 10 heterotic string does indeed display a nearhorizon enhancement to OSp(82) as predicted by the branescan, provided α ′ corrections are taken into account. If this logic could be extended to the other strings and branes, it would resolve this 21yearold paradox and provide a wealth of new AdS/CFT dualities, which we tabulate.
Nearhorizon branescan revived
, 804
"... In 1987 two versions of the branescan of Ddimensional super pbranes were put forward. The first pinpointed those (p,D) slots consistent with kappasymmetric GreenSchwarz type actions; the second generalized the membrane at the end of the universe idea to all those superconformal groups describin ..."
Abstract
 Add to MetaCart
(Show Context)
In 1987 two versions of the branescan of Ddimensional super pbranes were put forward. The first pinpointed those (p,D) slots consistent with kappasymmetric GreenSchwarz type actions; the second generalized the membrane at the end of the universe idea to all those superconformal groups describing pbranes on the boundary of AdSp+2 ×SD−p−2. Although the second version predicted D3 and M5 branes in addition to those of the first, it came unstuck because the 1/2 BPS solitonic branes failed to exhibit the required symmetry enhancement in the nearhorizon limit, except in the nondilatonic cases (p = 2,D = 11), (p = 3,D = 10) and (p = 5,D = 11). Just recently, however, it has been argued that the fundamental D = 10 heterotic string does indeed display a nearhorizon enhancement to OSp(28) as predicted by the branescan, provided α ′ corrections are taken into account. If this logic could be extended to the other strings and branes, it would resolve this 21yearold paradox and provide new AdS/CFT dualities.
Nearhorizon branescan revived
, 804
"... In 1987 two versions of the branescan of Ddimensional super pbranes were put forward. The first pinpointed those (p,D) slots consistent with kappasymmetric GreenSchwarz type actions; the second generalized the membrane at the end of the universe idea to all those superconformal groups describin ..."
Abstract
 Add to MetaCart
(Show Context)
In 1987 two versions of the branescan of Ddimensional super pbranes were put forward. The first pinpointed those (p,D) slots consistent with kappasymmetric GreenSchwarz type actions; the second generalized the membrane at the end of the universe idea to all those superconformal groups describing pbranes on the boundary of AdSp+2 ×SD−p−2. Although the second version predicted D3 and M5 branes in addition to those of the first, it came unstuck because the 1/2 BPS solitonic branes failed to exhibit the required symmetry enhancement in the nearhorizon limit, except in the nondilatonic cases (p = 2,D = 11), (p = 3,D = 10) and (p = 5,D = 11). Just recently, however, it has been argued that the fundamental D = 10 heterotic string does indeed display a nearhorizon enhancement to OSp(82) as predicted by the branescan, provided α ′ corrections are taken into account. If this logic could be extended to the other strings and branes, it would resolve this 21yearold paradox and provide new AdS/CFT dualities.
HUTP99/A031 hepth/9906056
, 1999
"... The KaluzaKlein spectrum of N=2, D=4 supergravity compactified on AdS2×S 2 is found and shown to consist of two infinite towers of SU(1,12) representations. In addition to ‘pure gauge ’ modes living on the boundary of AdS which are familiar from higher dimensional cases, in two dimensions there ar ..."
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The KaluzaKlein spectrum of N=2, D=4 supergravity compactified on AdS2×S 2 is found and shown to consist of two infinite towers of SU(1,12) representations. In addition to ‘pure gauge ’ modes living on the boundary of AdS which are familiar from higher dimensional cases, in two dimensions there are modes (e.g. massive gravitons) which enjoy no gauge symmetry yet nevertheless have no onshell degrees of freedom in the bulk. We discuss these twodimensional subtleties in detail.