Found 5 result(s)
Regular Seminar Nikolay au:Bobev'><span class='hl'>Nikolay</span> Bobev (KUL Leuven)
at: 14:00 room Zoom  abstract: I will describe a class of supergravity solutions holographically dual to ddimensional maximally supersymmetric SYM on S^d. Supersymmetric localization can be employed to calculate the partition function and the VEV of a 1/2BPS Wilson lines in the planar limit of the SYM theory. I will present the results of this calculation and will show how they lead to a nontrivial precision test of holography in the context of nonconformal QFTs and spacetimes that are non asymptotically locally AdS. 
Regular Seminar Nikolay au:Bobev'><span class='hl'>Nikolay</span> Bobev ( KU Leuven)
at: 13:15 room S2.49  abstract: I will describe the onedimensional complex conformal manifold that controls the infrared dynamics of a threedimensional N=2 supersymmetric theory of three chiral superfields with a cubic superpotential. Two special points on this conformal manifold are the XYZ model and three decoupled copies of the critical WessZumino model. The conformal manifold enjoys a discrete duality group and can be thought of as an orbifold of CP^1. I will discuss how to compute the spectrum of low lying operators and their OPE coefficients as a function of the coordinate on the conformal manifold using the epsilonexpansion and the numerical conformal bootstrap. 
Regular Seminar Nikolay au:Bobev'><span class='hl'>Nikolay</span> Bobev (KU Leuven)
at: 14:00 room H503  abstract: Superconformal field theories placed in nontrivial background fields for the metric and the continuous global symmetries exhibit a rich web of RG flows across dimensions. I will discuss several examples of such flows and emphasize some of their universal features. In addition, I will employ nonperturbative tools such as 't Hooft anomaly matching, a, F, and cextremization, and holography to gain a quantitative understanding of some aspects of these theories. Finally, I will discuss the relevance of these results for a microscopic understanding of the entropy of supersymmetric black holes and strings in AdS. 
Triangular Seminar Nikolay au:Bobev'><span class='hl'>Nikolay</span> Bobev (Leuven)
at: 16:30 room Peoples Palace PP2  abstract: I will discuss the gravitational dual of a mass deformation of N=4 SYM, called N=2* SYM, on S^4. Using holographic techniques one can calculate the universal contribution to the corresponding free energy in the planar limit and at large 't Hooft coupling. The result matches the expression recently computed using supersymmetric localization in the field theory. This agreement constitutes a nontrivial precision test of holography in a nonconformal setting. I will also briefly discuss the extension of these results to mass deformations of N=4 SYM with N=1 supersymmetry. 
Regular Seminar Nikolay au:Bobev'><span class='hl'>Nikolay</span> Bobev (Stony Brook)
at: 14:00 room B539  abstract:
