Found 3 result(s)

### 23.04.2020 (Thursday)

#### Exact results with defects: an overview

Journal Club Lorenzo Bianchi (QMUL)

 at: 10:00 Otherroom Zoom, instructions in abstract abstract: I will give a summary of recent progress in the computation of exact results in the presence of superconformal defects, focusing on a special class of defect correlators. Along the way, I will comment on the possibility of using integrability and propose various future directions. NOTE: to receive the link please fill the registration form at integrability-london.weebly.com

### 19.11.2019 (Tuesday)

#### TBA

Regular Seminar Lorenzo Bianchi ()

 at: 13:30 ICroom H503 abstract:

### 28.01.2016 (Thursday)

#### Perturbative and numerical aspects of string sigma models

Regular Seminar Lorenzo Bianchi (DESY Hamburg)

 at: 14:00 QMWroom G.O. Jones 610 abstract: In the last fifteen years an extensive and successful program has been carried out, consisting in the application of integrability techniques to the study of the AdS/CFT correspondence in the planar limit. In this talk we focus on a particular string background corresponding, on the dual side, to the expectation value of a cusped Wilson line. Recently the study of this background has been boosted by the OPE program for polygonal Wilson loops and scattering amplitudes. In this talk we consider the quantum fluctuations of the worldsheet theory around the null cusp classical solution and we investigate various quantities of physical interest (free energy, dispersion relation, S-matrix) in the perturbative expansion at strong coupling. We also propose a possible discretization of this model which can be used to study the theory non-perturbatively through numerical lattice simulations.