# string club

Tuesday at 2:45 or 4PM(note time change)

Center for Theoretical Physics,

NE25-4th floor

5 Cambridge Center

Massachusetts Institute of Technology

The String Club is a forum for members of the string theory group (and long-term visitors) to discuss their current work with each other. Talks are informal and usually blackboard. All are welcome to attend. PLEASE NOTE THE TIME CHANGES FROM WEEK TO WEEK DUE TO OTHER SEMINARS EVERY THIRD WEEK.

##### Organizers

Henriette Elvang and Allan Adams

### Spring 2007 schedule of talks

February 13, 2:45PM

**Thomas Klose
**

*World Sheet and Integrability*

February 20, 4PM

**Joseph Minahan**

*Kappa Symmetry*

*, Part I*

February 27, 4PM

**Alessandro Torrielli**

*``Hopf algebras and integrable structures in AdS-CFT"*

Abstract: "We will provide an introduction to Hopf algebras, and explain

how they have become relevant for the issue of integrability in AdS-CFT.

After introducing the mathematical notions, an Hopf algebra for the N=4

SYM super-spin-chain will be formulated, and connected developments on the

string theory side will be mentioned."

March 6, 2:45PM

**Joseph Minahan**

*Kappa Symmetry Part II*

March 13, 2:45PM

**Koji Hashimoto**

*Holographic QCD and Pion Mass*

**March 20, 4PM**

**Yosuke Imamura**

*Anomalies and exactly marginal deformations in brane tilings*

March 27 no talk, Spring Break

April 3, 2:45PM

**Bogdan Stefanski**

*Landau-Lifshitz sigma models and the AdS/CFT correspondence*

**
**April 10, 2:45PM

Sanefumi Moriyama

Sanefumi Moriyama

*Correspondence between Light-Cone String Field Theory and Matrix String Theory*

April 17, 2:45PM

**no seminar due to Patriot's day vacation no classes at MIT**

**April 24, 2:45PM**

no seminar this week

***May 2, 2PM (Note different day and time)**

**Michael Kiermaier**"Analytic Solutions in Open String Field Theory"

Abstract:

After a short introduction to the basic concepts of String Field Theory,

the algebraic and geometric insights that recently allowed the explicit

construction of analytic solutions in SFT will be outlined. Then the

solution corresponding to marginal deformations will be derived. It

constitutes the first solution that is not gauge equivalent to a

(perturbative or non-perturbative) vacuum.

**
**May 8, 2:45PM

**David Vegh**

``Quivers and Shivers "

ABSTRACT:

Brane tilings are useful tools for describing the matter content and superpotential

of quiver gauge theories on a stack of D3-branes probing toric Calabi-Yau singularities.

A brief introduction to tilings is followed by the discussion of more recent results.

** Talks are completed until September 2007
**