Lectures related to Source field

Explores the quantum effective action, its role in perturbation theory, and the organization of correlators in momentum space.

Explores Euclidean wormholes, holography, scalar correlators, and toy QFT models.

Explores Euclidean correlation functions and the transition to real time using Wick rotation, along with a discussion on good and bad habits.

Covers the transition from Euclidean to real time by analytic continuation.

Explores the Renormalization Group in field theory, discussing scaling functions, critical exponents, and Gaussian fixed points.

Covers advanced topics in Quantum Field Theory, including representations of the Poincare group and the construction of unitary irreps.

Explores functional methods in quantum field theory, coupling systems to external sources and introducing the path integral with source.