`Found 5 result(s)`

2156' style='color:#f0ad4e'>#### Superconformal index and gravitational path-integral

Regular Seminar Francesco au:Benini'><span class='hl'>Francesco</span> Benini (SISSA, Trieste)

at:13:30
room zoom 871 9223 5980 | abstract: AdS/CFT provides a consistent non-perturbative definition of quantum gravity in asymptotically AdS spacetimes. Black holes correspond to ensembles of states in the boundary field theory. In the presence of supersymmetry, we rephrase the problem of counting those states in terms of a supersymmetric partition function: the superconformal index. By performing a careful analysis of the index of 4d N=4 SU(N) Super-Yang-Mills theory, with the help of a Bethe Ansatz approach, we are able to exactly reproduce the Bekenstein-Hawking entropy of BPS black holes in AdS5 x S5. The large N limit exhibits many competing contributions, that we are able to identify with complex saddles of the (putative) gravitational path-integral. Along the way we propose a necessary condition for complex saddles to contribute, based on the size of their non-perturbative corrections. |

1873' style='color:#f0ad4e'>#### Black holes in N=4 Super-Yang-Mills

Regular Seminar Francesco au:Benini'><span class='hl'>Francesco</span> Benini (SISSA)

at:14:00
room H503 | abstract: AdS/CFT provides a consistent non-perturbative definition of quantum gravity in asymptotically AdS space. Black holes should correspond to ensembles of states in the boundary field theory. By analyzing the superconformal index of 4d N=4 SU(N) Super-Yang-Mills, with the help of a new Bethe Ansatz type formula, we are able to exactly reproduce the Bekenstein-Hawking entropy of BPS black holes in AdS5 x S5. The large N limit exhibits many competing contributions and Stokes phenomena, hinting at new physics. |

1865' style='color:#f0ad4e'>#### Black holes in N=4 Super-Yang-Mills

Regular Seminar Francesco au:Benini'><span class='hl'>Francesco</span> Benini (SISSA, Trieste)

at:13:15
room S2.49 | abstract: AdS/CFT provides a consistent non-perturbative definition of quantum gravity in asymptotically AdS space. Black holes should correspond to ensembles of states in the boundary field theory. By analyzing the superconformal index of 4d N=4 SU(N) Super-Yang-Mills, with the help of a new Bethe Ansatz type formula, we are able to exactly reproduce the Bekenstein-Hawking entropy of BPS black holes in AdS5 x S5. The large N limit exhibits many competing contributions and Stokes phenomena, hinting at new physics. |

1499' style='color:#f0ad4e'>#### Black hole microstates in AdS from gauge theory

Regular Seminar Francesco au:Benini'><span class='hl'>Francesco</span> Benini (Imperial College)

at:13:15
room S0.13 | abstract: One of the great successes of string theory, as a theory of quantum gravity, is the explanation of the entropy of asymptotically-flat black holes. I will present, instead, a counting of the microstates of certain black holes in AdS4. The black holes have an holographic description as RG flows from a 3D CFT to superconformal quantum mechanics, and the counting of microstates proceeds via supersymmetric localization. Along the way, we will define and compute an index for topologically twisted theories, and propose an extremization principle to determine the superconformal R-symmetry in quantum mechanics. |

523' style='color:#f0ad4e'>#### Backreacting Flavors in the KS Background: a New Cascade

Regular Seminar Francesco au:Benini'><span class='hl'>Francesco</span> Benini (SISSA)

at:14:00
room Huxley 503 | abstract: I present new analytic solutions of type IIB supergravity with fully backreacting D7-branes describing the addition of an arbitrary number of flavors to the Klebanov-Tseytlin and Klebanov-Strassler theories. I provide a detailed analysis of the field theory and of the duality cascade which describes its RG flow, Seiberg duality is understood as a large gauge transformation in supergravity. Moreover the string background suggests that the UV behavior is a duality wall. |