2D CFTs and Dual Description of Deformed Integrable Sigma Models

Explore an advanced physics lecture examining Conformal Field Theories (CFTs) and their relationship to deformed integrable sigma models in two dimensions. Delve into the study of CFTs defined by screening charge systems with continuous parameter b, and discover how these systems, when enhanced with additional screening charges, establish connections to both Toda Quantum Field Theory (QFT) and deformed sigma models. Learn how the two-particle scattering matrix compares to trigonometric Yang-Baxter equation solutions, and understand the consistency between deformed sigma model Renormalization Group (RG) flow and screening charges. Examine practical applications through O(N) and OSp(N|2m) theory examples. Delivered by Dr. Mikhail Alfimov, Associate Professor at HSE University and Research Fellow at Lebedev Physical Institute, this technical presentation draws from his expertise in integrable quantum field theories and sigma models.