Events Archive

High Energy Theory Seminar

HET Seminar | Mark van Raamsdonk, University of British Columbia | “Nonlinear Gravity from Entanglement”

HET Seminar | Leonard Susskind, Stanford University | “The Second Law of Quantum Complexity”

HET Seminar | Leonard Susskind, Stanford University | “Black Holes and Quantum Complexity”

HET Seminar | Razvan Gurau, Ecole Polytechnique | "The 1/N expansion in tensor models at all orders"

Fri, Feb 17, 2017, 1:45 pm

Combinatorial maps (generated in the Feynman expansion of matrix models) can be classified by a non negative integer, the genus. Edge colored graphs (generated in the Feynman expansion of tensor models) can similarly be classified by a non negative integer, the degree.

HET Seminar | Valentina Forini, Humboldt University-Berlin | "Worldsheet string theory in AdS/CFT and lattice"

Mon, Feb 13, 2017, 2:30 pm

String sigma-models relevant in AdS/CFT are highly non-trivial two-dimensional field theories for which predictions at finite coupling assume integrability and/or the duality itself. After having discussed general features of the perturbative approach,  I will present progress on how to extract finite coupling information via the use of lattice...

HET Seminar | Yvonne Geyer, Member, School of Natural Sciences, IAS | "TBA"

HET Seminar | Sergei Dubovsky, NYU | “Towards a Theory of the QCD String”

HET Seminar | Igor Klebanov, Princeton University | "Tensor Models and Melonic Large N Limits"

Mon, Jan 30, 2017, 2:30 pm

We review the double line notation for the Feynman diagram expansion of N by N matrix models. In the ‘t Hooft large N limit only the planar diagrams survive, and the dual graphs may be thought of as discretized random surfaces. We proceed to theories where the dynamical degrees of freedom are rank-3 tensors with distinguishable indices, each of...

HET Seminar | Anton Kapustin, California Institute of Technology | "Bosonization in Two and Three Dimensions and Spin Structures”

Mon, Dec 12, 2016, 2:30 pm to Wed, Dec 7, 2016, 3:30 pm
I will explain in examples how to incroporate the dependence on spin structure in fermionic lattice models. In two dimensions, I show to construct a spin-TQFT out of a superalgebra. In three dimensions, it turns out that fermionic lattice models are related to bosonic models with a global 1-form symmetry.

HET Seminar | Raffaele D'Agnolo, Member, School of Natural Sciences, IAS | "WIMPs, Miracles and Coincidences"

Fri, Dec 9, 2016, 1:45 pm to 2:45 pm
I will briefly review our current experimental knowledge of dark matter and then discuss recent developments in model building. In particular I will show that dark matter can be a thermal relic exponentially lighter than the weak scale without being exponentially weakly coupled.

HET Seminar | Steve Gubser, Princeton University | "p-adic AdS/CFT"

Fri, Dec 2, 2016, 1:45 pm to 2:45 pm
I will give a first-principles introduction to p-adic numbers and p-adic AdS/CFT. p-adic numbers are an alternative to the real numbers, and they have a hierarchical structure which lends itself naturally to a holographic construction. The bulk dual to a p-adic boundary is the so-called Bruhat-Tits tree, an infinite regular graph.

HET Seminar | Igal Arav, Tel Aviv University | "Non-Relativistic Scale Anomalies and Geometry"

Tue, Nov 29, 2016, 1:30 pm to 2:30 pm
I will discuss the coupling of non-relativistic field theories to curved spacetime, and develop a framework for analyzing the possible structure of non-relativistic (Lifshitz) scale anomalies using a cohomological formulation of the Wess-Zumino consistency condition.

HET Seminar | Jaume Gomis, Perimeter Institute | “Correlation Functions in Superconformal Field Theories”

Mon, Nov 28, 2016, 2:30 pm to 3:30 pm
We discuss the exact determination of correlation functions of local operators in four-dimensional N=2 superconformal field theories.

HET Seminar | Bogdan Stoica, Brandeis University | "Tensor networks, p-adic fields, and algebraic curves: arithmetic and the AdS3/CFT2 correspondence"

Mon, Nov 21, 2016, 2:30 pm to 3:30 pm
One of the many remarkable properties of conformal field theory in two dimensions is its connection to algebraic geometry. Since every compact Riemann surface is a projective algebraic curve, many constructions of interest in physics (which a priori depend on the analytic structure of the spacetime) can be formulated in purely algebraic language.

HET Seminar | Clay Cordova, Member, School of Natural Sciences, IAS | “Anomalies of 6d SCFTs”

Senthil Todadri, Massachusetts Institute of Technology - "Symmetry Enriched Emergent U(1) Gauge Theories"

Mon, Nov 14, 2016, 2:30 pm to 4:00 pm
Phases of quantum many particle systems can have low energy effective field theoretic descriptions in terms of gauge theories in their deconfined phase.

HET Seminar | Senthil Todadri, Massachusetts Institute of Technology | “Symmetry Enriched Emergent U(1) Gauge Theories"

Mon, Nov 14, 2016, 2:30 pm to 3:30 pm
Phases of quantum many particle systems can have low energy effective field theoretic descriptions in terms of gauge theories in their deconfined phase.

HET Seminar | Thomas Mertens, Princeton University | “An Investigation of AdS2 Backreaction and Holography"

Fri, Nov 11, 2016, 1:45 pm to 3:00 pm
In this talk, I will discuss the Jackiw-Teitelboim model in 2d dilaton gravity in a holographic context. After deriving the boundary time reparametrization equation and the holographic stress tensor, I will demonstrate that these can be obtained from an effective boundary model.

HET Seminar | Daniel Park, Rutgers University | "Towards Finding All Elliptically Fibered Calabi-Yau Threefolds"

Mon, Nov 7, 2016, 2:30 pm to 3:30 pm
I will review the efforts made towards approaching string universality in six dimensions and report recent "cartographic" developments on exploring the landscape of six-dimensional string vacua. A working conjecture is that all six-dimensional string vacua can be constructed in F-theory, which leads to the problem of classifying all elliptically...

HET Seminar | Xi Dong, Member, School of Natural Sciences, IAS | "The Ryu-Takayanagi Formula and Extremal Surfaces”

Fri, Nov 4, 2016, 1:45 pm to 2:45 pm
The Ryu-Takayanagi formula and its quantum-corrected version are useful in understanding many aspects of quantum gravity such as subregion duality, emergence of the radial direction, and the generalized second law.

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