Events Archive

High Energy Theory Seminar

HET Seminar | Alexander Zamolodchikov, Rutgers | “Space of Field Theories, UV Completeness, and Integrability”

HET Seminar | Kiril Hristov, Bulgarian Academy of Sciences, Sofia | "Black hole microstates in AdS_4 and AdS_5 from supersymmetric partition functions

Fri, May 26, 2017, 1:45 pm

This talk addresses the problem of counting the microstates of supersymmetric asymptotically AdS black holes in terms of a holographically dual field theory. We focus on a particular BPS class of AdS_2 x S^2 near-horizon geometry in N=2 gauged supergravity relevant both for AdS_4 and AdS_5 black holes.

HET Seminar | Sunil Mukhi, Tata Institute for Fundamental Research | “Entanglement, Replicas and Thetas”

HET Seminar | Gustavo Joaquin Turiaci, Princeton University | "Schwarzian Quantum Mechanics and the Bootstrap"

Mon, May 15, 2017, 2:30 pm

The Schwarzian theory was proposed by A. Kitaev as a low energy effective theory for quantum mechanical systems presenting holographic behavior, beginning with the SYK model. In this talk we will study the Schwarzian theory as a limit of two dimensional Liouville theory.

HET Seminar | Nikita Nekrasov, Stony Brook University | “Magnificent Four”

Mon, May 8, 2017, 2:30 pm

Supersymmetric gauge theories in various spacetime dimensions lead to enumerative problems: counting of holomorphic curves in Calabi-Yau manifolds, intersection theory on moduli spaces of instantons, limit shapes for random Young diagrams in two and three dimensions. The latter problem is related to dimer models and the models of crystal...

HET Seminar | Douglas Stanford, Member, School of Natural Sciences, IAS | “How Much Information Can We Get From Traversable Wormoles?”

Fri, May 5, 2017, 1:45 pm

The traversable wormhole protocol of Gao, Jafferis and Wall gives us a glimpse behind the horizon of certain black holes. I will describe this effect and discuss some limited applications to the black hole information problem. Based on a recent paper with Maldacena and Yang.

HET Seminar | Wolfger Peelaers, Rutgers University | "4d/2d correspondences, localization and surface operators"

Fri, Apr 28, 2017, 1:45 pm

Four-dimensional N=2 supersymmetric and superconformal quantum field theories take part in various 4d/2d correspondences, which map computations of certain protected data of the four-dimensional theory to problems in two-dimensional models.

HET Seminar | Onkar Parrikar, University of Pennsylvania | "Entanglement Entropy and the Colored Jones Polynomial”

Mon, Apr 24, 2017, 2:45 pm

We will study the entanglement structure of states in Chern-Simons (CS) theory obtained by performing the Euclidean path-integral on certain highly non-trivial 3-manifolds, namely link complements in S^3.

HET Seminar | Mirjam Cvetic, University of Pennsylvania | “Continuous and Discrete Gauge Symmetries in F-Theory”

Fri, Apr 21, 2017, 1:45 pm

We present recent developments in F-theory compactifications and focus on advances in constructions of globally consistent F-theory compactifications with Abelian and discrete gauge symmetries, emphasizing technical advances and insights into higher-rank gauge symmetries.

HET Seminar | Eva Silverstein, Stanford University | “Six Point String Scattering: Simulation of Horizon Infallers”

HET Seminar | David Meltzer, Yale University | “The Conformal Bootstrap in the Regge Limit”

Fri, Apr 14, 2017, 1:45 pm

The analytic bootstrap has revealed universal constraints and structures in higher dimensional CFTs which relate causality, positive energy conditions, and large spin subsectors of the theory. I will present recent work extending the study of the bootstrap equations to the Regge limit for large N CFTs.

HET Seminar | Umut Gursoy, Utrecht University | "An instability in asymptotically AdS black-branes”

Mon, Apr 10, 2017, 2:30 pm

I will demonstrate presence of a vanishing momentum unstable quasi-normal mode in a certain class of asymptotically AdS black brane solutions and present the fully backreacted time evolution of the system resulting from this instability.

HET Seminar | Rob Myers, Perimeter Institute | "Holographic Complexity: A Progress Report”

Mon, Apr 3, 2017, 2:30 pm

I will describe some recent work studying proposals for computational complexity in holographic theories. I will discuss properties of the new gravitational observables and of complexity in the boundary theory.

HET Seminar | Netta Engelhardt, Princeton University | "Lightcone Cut Holography"

Fri, Mar 31, 2017, 1:45 pm

In this talk, I will give an answer to the question “which QFT states holographically describe the emergence of semiclassical (conformal) geometry?” via a new construct in QFT: the causal density matrix. This new construct relies on the “lightcone cut” approach to spacetime emergence, and generalizes it to arbitrary QFTs (that may or may not...

HET Seminar | Nikolay Bobev, KU Leuven | "RG Flows Across Dimensions and Holography"

Mon, Mar 27, 2017, 2:30 pm

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.

HET Seminar | Abhijit Gadde, Member, School of Natural Sciences, IAS | "Group Theory of the Crossing Equation”

Fri, Mar 24, 2017, 1:45 pm

I formulate the conformal crossing equation in a way that manifests the conformal representation theory. In this form the crossing equation can be generalized to any group. Using SU(2) as a toy model I compute solutions to the crossing equation in terms of the 6j-symbol of the group.

Bootstrap Collaboration Online Seminar | Riccardo Rattazzi | "Conformal superfluids and CFT data"

HET Seminar | Maxime Gabella, Member, School of Natural Sciences, IAS | "“BPS Graphs for Class S”

Fri, Mar 17, 2017, 1:45 pm

I will present the concept of a “BPS graph” (a special kind of spectral network) and illustrate its usefulness in the study of theories of class S. BPS graphs encode BPS quivers, even for higher rank and in the presence of non-full punctures, and lead to new constructions of BPS monodromies.

HET Seminar | David Kutasov, UChicago | “TT and LST”

HET Seminar | Mauricio Romo, Member, School of Natural Sciences, IAS | "SL(N) Chern-Simons, Cluster Algebras and Defects"

Fri, Mar 10, 2017, 1:45 pm

I'll describe the cluster partition function (CPF), a computational tool that uses elements from cluster algebra and representation theory to describe the partition function of Chern-Simons theory with gauge group SL(N,C), on knot complements.