# String Seminars

This series consists of talks in the area of Superstring Theory.

## Seminar Series Events/Videos

Currently there are no upcoming talks in this series.

## 3-Manifolds and 3D Gauge Theories

Friday Sep 02, 2011
Speaker(s):

I will first summarize recent exact localization computations of supersymmetric gauge theories, and then discuss curious connections between SUSY/non-SUSY theories coming from 6d (2,0) theories. I particular, I will focus on our recent proposal relating 3d N=2 theories and 3d SL(2,R) Chern-Simons theories (or more mathematically, geometry of 3-manifolds).

Collection/Series:
Scientific Areas:

## On the Quantum Theory of Effective Strings

Friday Jul 29, 2011
Speaker(s):

Effective field theory is an indispensable tool for the analysis of emergent theories, in which we may know little about the UV degrees of freedom of the theory, and still tremendous amount of information can be revealed only by guessing the light degrees of freedom and symmetries. In this talk I will make use of this tool to describe the quantum theory of emergent long strings, open or closed, where the string need not be fundamental (thus not critical), nor it is strictly one dimensional.

Collection/Series:
Scientific Areas:

## Hints on integrability in the Holographic RG

Tuesday Jun 14, 2011
Speaker(s):

The Polchinski equations for the Wilsonian renormalization group in the $D$--dimensional matrix scalar field theory can be written at large $N$ in a Hamiltonian form. The Hamiltonian defines evolution along one extra holographic dimension (energy scale) and can be found exactly for the subsector of $Tr\phi^n$ (for all $n$) operators. We show that at low energies independently of the dimensionality $D$ the Hamiltonian system in question reduces to the {\it integrable} effective theory.

Collection/Series:
Scientific Areas:

## Part 3: Monte-Carlo approach to the gauge/gravity duality

Thursday Jun 02, 2011
Speaker(s):

The gauge/gravity duality may give a nonperturbative formulation of superstring/M theory, and hence, if one can study the nonperturbative dynamics of the gauge theory, it would be useful to understand the nonperturbative aspects of superstring theory.

Collection/Series:
Scientific Areas:

## Part 2: Monte-Carlo approach to the gauge/gravity duality

Wednesday Jun 01, 2011
Speaker(s):

The gauge/gravity duality may give a nonperturbative formulation of superstring/M theory, and hence, if one can study the nonperturbative dynamics of the gauge theory, it would be useful to understand the nonperturbative aspects of superstring theory.

Collection/Series:
Scientific Areas:

## Part 1: Monte-Carlo approach to the gauge/gravity duality

Tuesday May 31, 2011
Speaker(s):

The gauge/gravity duality may give a nonperturbative formulation of superstring/M theory, and hence, if one can study the nonperturbative dynamics of the gauge theory, it would be useful to understand the nonperturbative aspects of superstring theory.

Collection/Series:
Scientific Areas:

## Loop calculations in Superconformal Chern-Simons

Wednesday May 25, 2011
Speaker(s):

We discuss the calculation of higher loop contributions to the anomalous dimensions of operators in N=6 Superconformal Chern-Simons theories. These lead us to conjecture the form of an interpolating function of the 't Hooft coupling that is not determined by integrability.

Collection/Series:
Scientific Areas:

## Holography for non-relativistic theories

Tuesday May 17, 2011

I will discuss the construction of a holographic dictionary for theories with non-relativistic conformal symmetry, relating the field theory to the dual spacetime. I will focus on the case of Lifshitz spacetimes, giving a definition of asymptotically locally Lifshitz spacetimes and discussing the calculation of field theory observables and holographic renormalization.

Collection/Series:
Scientific Areas:

## Part 2: An introduction to the pure-spinor formalism for the superstring

Thursday May 12, 2011
Speaker(s):

Higher loop amplitudes and non-minimal formalism

Collection/Series:
Scientific Areas:

## An introduction to the pure-spinor formalism for the superstring - Part 1

Wednesday May 11, 2011
Speaker(s):

Pure spinors, BRST cohomology and tree-level amplitudes

Collection/Series:
Scientific Areas:

## RECENT PUBLIC LECTURE

### WATER STRESS: SEEKING SOLUTIONS IN THE UNUSUAL PROPERTIES OF WATER

Speaker: Marcia Barbosa