Jaume Gomis
(Perimeter Institute)
11/08/2014, 10:30
We will characterize the physical content of the partition function of conformal
and superconformal field theories on a sphere. These results will be used to give
a complete microscopic gauge theory description of arbitrary M2-branes ending on M5-branes wrapped on a Riemann surface.
Cyril Closset
(Simons Center)
11/08/2014, 14:00
The study of supersymmetric quantum field theories on compact manifolds has led to a plethora of new exact results in recent years. One of the simplest observable in this context is the supersymmetric partition function on a manifold M, Z_M, which can often be computed exactly.
In the case of theories with four supercharges in flat space, I will explain some general properties of Z_M which...
Kentaro Hori
(Kavli IPMU)
12/08/2014, 10:30
We compute the Witten index of one-dimensional gauged linear sigma models with at least N=2 supersymmetry. In the phase where the gauge group is broken to a finite group, the index is expressed as a certain residue integral. It is subject to a change as the Fayet-Iliopoulos parameter is varied through the phase boundaries. The wall crossing formula is expressed as an integral at infinity of...
Zohar Komargodski
(Weizmann Inst.)
13/08/2014, 14:00
It is remarkable that light or even massless spin 1 particles can be composite. Consequently, gauge invariance is not fundamental but emergent. This idea can be realized in detail in supersymmetric gauge theories.
We will describe the recent development of non-perturbative methods that allow to test this idea. One finds that the emergence of gauge symmetry is linked to some results in...
Marcos Marino Beiras
(Univ Geneva)
14/08/2014, 10:30
By using localization, we derive exact and closed expressions for partition functions of N=8 Chern-Simons-matter theories. This allows us to address the nature of quantum geometry and of small distances in M-theory. We show that, although classical geometry is modified due to membranes, there is a smooth interpolation from the semiclassical gravity regime all the way down to the Planck scale....
Eric Sharpe
(Virginia Tech)
15/08/2014, 10:30
In this talk we will discuss various advances in Seiberg-like dualities in two-dimensional gauge theories with (2,2) and (0,2) supersymmetry. We begin with a quick review of the (2,2) supersymmetric CP^n model and nonabelian analogues, and review other (2,2) and (0,2) dualities, such as in gauge theories with both fundamentals and antifundamentals. In two dimensions, the gauge field has no...
Kazuo Hosomichi
(Yukawa Institute)
15/08/2014, 14:00
We study the system of M2-branes suspended between parallel M5-branes
using ABJM model with a natural half-BPS boundary condition. For small
separation between M5-branes, the worldvolume theory is shown to
reduce to a 2D N=(4,4) super Yang-Mills theory with some similarity to
q-deformed Yang-Mills theory. The gauge coupling is related to the
position of the branes in an interesting manner. The...
Vasily Pestun
(IHES)
18/08/2014, 10:30
Equivariantly deformed N=2 four-dimensional gauge theories in the
limit when one epsilon-deformation parameter is set to zero relate to
quantum integrable systems. I will describe in details the
correspondence for a large class of N=2 theories (quiver gauge theories)
Sungjay Lee
(Univ Chicago)
18/08/2014, 14:00
In the first part of this talk, we discuss the equivariant elliptic genera of ALE and ALF manifolds. The elliptic genera exhibit interesting pole structure as a function of the chemical potentials. We use this to decompose the answers into polar terms that exhibit wall-crossing and universal terms. We also discuss applications of our results to counting of BPS world-sheet spectrum of self-dual...
Francesco Benini
(Simons Center)
19/08/2014, 10:30
In the first part of the talk we study some dualities of two-dimensional
supersymmetric N=(2,2) gauge theories, reminiscent of 4d Seiberg
duality, focusing on chiral and twisted chiral rings and the so-called
sphere partition function. In the second part we observe that, when
applied to quiver gauge theories, those dualities realize the cluster
algebras of Fomin and Zelevinsky in their full...
Maxim Zabzine
(Univ Uppsala)
19/08/2014, 15:30
I will review the localization on 5D Yang-Mills theory with matter on toric Sasaki-Einstein
manifolds. I wil review some contact toric geometry, briefly explain the calculation and its
relation to Calabi-Yau cone. I will discuss the conjecture for the full answer and some other open
problems.
Abhijit Gadde
(Caltech)
21/08/2014, 10:30
We study dynamics of two-dimensional non-abelian gauge theories with N=(0,2) supersymmetry that include N=(0,2) supersymmetric QCD and its generalizations. For a range of parameters where supersymmetry is not dynamically broken at low energies, we give a complete description of the low-energy physics in terms of 2d N=(0,2) SCFTs using anomaly matching and modular invariance.
Stefano Cremonesi
(Imperial College)
21/08/2014, 14:00
I will explain how the Coulomb branch of certain 3d N=4 generalised quiver gauge theories can be used to compute the Hilbert series of the moduli space of k G-instantons, for any simple Lie group G (including non-simply laced ones). The generalized quivers are over-extended untwisted affine Dynkin diagrams.
Nadav Drukker
(Humboldt University)
21/08/2014, 15:30
I will review the calculation of the partition function of 3d supersymmetric field theories on S^3 using the fermi-gas approach to solve the matrix integral. The resulting expression is an Airy function and is valid perturbatively to all orders in 1/N for a wide class of theories (including ABJM). This suggests that a similar formula can be derived by studying quantum gravity on AdS_4. I will...
Tomeu Fiol
(Univ Barcelona)
22/08/2014, 10:30
We consider a heavy probe coupled to a general four-dimensional conformal field theory, and argue that a variety of interesting quantities are determined in terms of a single function, the Bremsstrahlung function, that depends on the probe and on the theory. For the particular case of a heavy probe coupled to N=4 super Yang Mills, we use localization techniques to determine the corresponding...
Silviu Pufu
(Univ Princeton)
22/08/2014, 14:00
There has been a lot of recent progress in applying the conformal bootstrap technique to obtain exact non-perturbative information about various conformal field theories. In this talk, I will use the conformal bootstrap to study superconformal field theories with N=8 supersymmetry in three dimensions. In particular, I will provide bounds on various operator dimensions and OPE coefficients...
