Results 1 - 10
of
22
String Theory Effects on Five-Dimensional Black Hole Physics
, 2008
"... We review recent developments in understanding quantum/string corrections to BPS black holes and strings in five-dimensional supergravity. These objects are solutions to the effective action obtained from M-theory compactified on a Calabi-Yau threefold, including the one-loop corrections determined ..."
Abstract
-
Cited by 8 (0 self)
- Add to MetaCart
(Show Context)
We review recent developments in understanding quantum/string corrections to BPS black holes and strings in five-dimensional supergravity. These objects are solutions to the effective action obtained from M-theory compactified on a Calabi-Yau threefold, including the one-loop corrections determined by anomaly cancellation and supersymmetry. We introduce the off-shell formulation of this theory obtained through the conformal supergravity method and review the methods for investigating supersymmetric solutions. This leads to quantum/string corrected attractor geometries, as well as asymptotically flat black strings and spinning black holes. With these solutions in hand, we compare our results with analogous studies in four-dimensional string-corrected supergravity, emphasizing the distinctions between the four and five dimensional theories.
Almost BPS black holes
, 812
"... k.goldstein [at] uu.nl, s.katmadas [at] uu.nl Abstract: We study non-BPS black hole solutions to ungauged supergravity with 8 supercharges coupled to vector multiplets in four and five dimensions. We identify a large class of five dimensional non-BPS solutions, which we call “almost BPS”, that are s ..."
Abstract
-
Cited by 4 (0 self)
- Add to MetaCart
(Show Context)
k.goldstein [at] uu.nl, s.katmadas [at] uu.nl Abstract: We study non-BPS black hole solutions to ungauged supergravity with 8 supercharges coupled to vector multiplets in four and five dimensions. We identify a large class of five dimensional non-BPS solutions, which we call “almost BPS”, that are supersymmetric on local patches and satisfy a first order flow governed by harmonic functions. By dimensional reduction, they give rise to new non-BPS solutions in four dimensions. These solutions allow for some nontrivial asymptotic moduli and multiple centres, similar to their globally supersymmetric cousins. We explicitly discuss a single centre and a two centre example.
Near-horizon brane-scan revived
, 804
"... In 1987 two versions of the brane-scan of D-dimensional super p-branes were put forward. The first pinpointed those (p, D) slots consistent with kappa-symmetric Green-Schwarz type actions; the second generalized the membrane at the end of the universe idea to all those superconformal groups describi ..."
Abstract
-
Cited by 1 (0 self)
- Add to MetaCart
(Show Context)
In 1987 two versions of the brane-scan of D-dimensional super p-branes were put forward. The first pinpointed those (p, D) slots consistent with kappa-symmetric Green-Schwarz type actions; the second generalized the membrane at the end of the universe idea to all those superconformal groups describing p-branes 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 near-horizon limit, except in the non-dilatonic 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 near-horizon enhancement to OSp(8|2) as predicted by the brane-scan, provided α ′ corrections are taken into account. If this logic could be extended to the other strings and branes, it would resolve this 21-year-old paradox and provide a wealth of new AdS/CFT dualities, which we tabulate.
Home Search Collections Journals About Contact us My IOPscience
"... Corrections to the statistical entropy of five dimensional black holes This article has been downloaded from IOPscience. Please scroll down to see the full text article. JHEP06(2009)024 ..."
Abstract
- Add to MetaCart
(Show Context)
Corrections to the statistical entropy of five dimensional black holes This article has been downloaded from IOPscience. Please scroll down to see the full text article. JHEP06(2009)024
by
, 2008
"... iv ter 5, where we implicitly construct a worldsheet CFT as the IR limit of an N = 2 gauge theory. Spacetime torsion (non-Kählerity) is incorporated via a two-dimensional Green-Schwarz mechanism in which a doublet of axions cancels the gauge anomaly. We also argue that these models are smoothly exte ..."
Abstract
- Add to MetaCart
(Show Context)
iv ter 5, where we implicitly construct a worldsheet CFT as the IR limit of an N = 2 gauge theory. Spacetime torsion (non-Kählerity) is incorporated via a two-dimensional Green-Schwarz mechanism in which a doublet of axions cancels the gauge anomaly. We also argue that these models are smoothly extendable to solutions of the exact beta-function equations. By string dualities, these solutions provide a microscopic description of certain type IIB RR-flux vacua. Finally, in chapter 6 we use recent developments to argue that there exists a holographic dual for the CFT living on a stack of N heterotic strings in R 4,1 × T 5; this should also be describable by an exact worldsheet CFT. We use supergravity to show that the global supergroup of the background is Osp(4 ∗ |4), with an affine extension given, surprisingly, by a nonlinear, N = 8 superconformal algebra. We also suggest a correspondence between supergroups with 16 supercharges and T n compactification with 0 ≤ n ≤ 7.Contents
Near-horizon brane-scan revived
, 804
"... In 1987 two versions of the brane-scan of D-dimensional super p-branes were put forward. The first pinpointed those (p,D) slots consistent with kappa-symmetric Green-Schwarz 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 brane-scan of D-dimensional super p-branes were put forward. The first pinpointed those (p,D) slots consistent with kappa-symmetric Green-Schwarz type actions; the second generalized the membrane at the end of the universe idea to all those superconformal groups describing p-branes 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 near-horizon limit, except in the non-dilatonic 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 near-horizon enhancement to OSp(8|2) as predicted by the brane-scan, provided α ′ corrections are taken into account. If this logic could be extended to the other strings and branes, it would resolve this 21-year-old paradox and provide a wealth of new AdS/CFT dualities, which we tabulate.
Near-horizon brane-scan revived
, 804
"... In 1987 two versions of the brane-scan of D-dimensional super p-branes were put forward. The first pinpointed those (p,D) slots consistent with kappa-symmetric Green-Schwarz 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 brane-scan of D-dimensional super p-branes were put forward. The first pinpointed those (p,D) slots consistent with kappa-symmetric Green-Schwarz type actions; the second generalized the membrane at the end of the universe idea to all those superconformal groups describing p-branes 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 near-horizon limit, except in the non-dilatonic 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 near-horizon enhancement to OSp(2|8) as predicted by the brane-scan, provided α ′ corrections are taken into account. If this logic could be extended to the other strings and branes, it would resolve this 21-year-old paradox and provide new AdS/CFT dualities.
Resolving Gravitational Singularities
, 808
"... Abstract. We review recent progress on the resolution of gravitational singularities in string theory. The main example is the fundamental string in five dimensions which is singular in the standard supergravity description but regular after taking into account higher derivative corrections determin ..."
Abstract
- Add to MetaCart
(Show Context)
Abstract. We review recent progress on the resolution of gravitational singularities in string theory. The main example is the fundamental string in five dimensions which is singular in the standard supergravity description but regular after taking into account higher derivative corrections determined by anomalies and supersymmetry. The application of the AdS/CFT correspondence to geometries that require higher derivatives for regularity poses interesting challenges. 1.
