(2023-05-23) Seminar: Fiona Seibold -- Understanding AdS/CFT through its integrable deformations

Abstract  

The discovery of integrability in the context of the AdS/CFT correspondence has led over the last 20 years to a plethora of exact results for physical, non-protected, observables. This gave us the opportunity to explore and test the holographic principle. Remarkably, it is possible to continuously deform the string theory on various AdS backgrounds while preserving this powerful property of integrability, but giving up some manifest symmetries, including supersymmetry. In this talk I will give an overview of these deformations, including T-duality--shift--T-duality (TsT) transformations, deformed non-abelian T-dualities, and quantum deformations such as the so-called eta- and lambda-deformations. Studying them teaches us lessons about the space of integrable string theories and the robustness of AdS/CFT.

Speaker

Dr. Fiona Seibold is a theoretical physicist who is currently a postdoctoral researcher at Imperial College London. She received her Ph.D. in physics from ETH Zurich in 2020, under the supervision of Prof. Niklas Beisert. Her research interests include integrable deformations of sigma models and superstrings, as well as the application of integrable systems to the AdS/CFT correspondence.