Fundamental Interactions: A Roadmap to Classical and Quantum Field Theories

This book offers a modern and accessible introduction to the quantum-relativistic world of fundamental interactions.It presents advanced concepts in a clear and structured way, combining detailed calculations with intuitive explanations of core ideas.Written in a concise and contemporary style, the book adopts interactive teaching approaches to support active learning.A wide range of exercises, including standard problems, open-ended questions, and discussion topics, helps readers consolidate and deepen their understanding. The material is organized into twelve chapters divided into three conceptual parts. The first part introduces classical field theory, covering relativistic frameworks, symmetries, spin, and the basic elements of group theory. The second part focuses on quantum field theories and the relationship between fields and particles, including bosons and fermions, together with their relativistic quantum description.It also addresses several open challenges in modern theoret