Found 3 result(s)

23.04.2020 (Thursday)

Exact results with defects: an overview

Journal Club Lorenzo Bianchi (QMUL)

10:00 Other
room Zoom, instructions in 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

19.11.2019 (Tuesday)


Regular Seminar Lorenzo Bianchi ()

13:30 IC
room H503

28.01.2016 (Thursday)

Perturbative and numerical aspects of string sigma models

Regular Seminar Lorenzo Bianchi (DESY Hamburg)

14:00 QMW
room G.O. Jones 610

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.