| Description: | [DPS Skype Talk] Dibakar Roychowdhury (Department of Physics, Swansea University,) -- Gauge/Gravity duality: An overview |
| Date: | Monday, Aug 13, 2018 |
| Time: | 2 p.m. - 3 p.m. |
| Venue: | 113, DPS Meeting Room, RC |
| Details: | I will talk about Gauge/Gravity duality in general with a summary of my past research activity that mostly focuses on the applications that range from usual condensed matter (many body) systems to relativistic heavy ion collisions. In the later part of my talk, I will discuss my current research interests that might be divided into two parts: Theme 1: Aspects of integrability beyond AdS5 S5 superstring theory-namely I am interested in exploring the integrability for QFTs with reduced SUSY for example N=2 SUSY theories those are dual to NATD of AdS5 S5 and N = (1; 0) theories in 6d those are dual to massive type IIA in 10d. These quiver theories are special in the sense that unlike the case for N = 4 SYM they do not have any Lagrangian description and therefore the question of integrability and other related questions are indeed quite tricky in these examples. Apart from these theories, there also exists some deformed integrable sigma models for example and models with reduced supersymmetries for which similar questions turn out to be relevant. In particular it is not a priori clear how one should interpret these deformed sigma models in the light of AdS/CFT duality. In other words, whether they admit any holographic description in terms of dual QFTs. These are the issues that I am currently trying to understand my self and with Carlos Nunez and other collaborators at Swansea U. Theme 2: The other issue is the understanding of SU(N) CS mater theories (with scalar in the fundamental) in 3d with a chemical potential. This is the project that I am currently working out with S Prem Kumar and one of his student. Because of the presence of the chemical potential the ground state falls in the symmetry broken phase that gives rise to non zero condensate. For N = 2, we explored the ground state of the theory and the quadratic uctuations at the classical level that gives the physical dispersion relation which includes the particles like phonon and rotons. Our next plan is to understand the picture at large N. The big picture here is to understand the fermi-bose dualities in 3D in the presence of chemical potential. |
| Calendar: | Seminar Calendar (entered by ghossain) |