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Quantum Field Theory of Point Particles and Strings

Quantum Field Theory of Point Particles and Strings explores the unification of quantum field theory (QFT) and string theory, starting from the fundamental principles of field quantization and extending to the dynamics of relativistic strings. The book systematically develops QFT for point particles, introducing canonical quantization, path integrals, and renormalization, before transitioning to the formulation of string theory as a natural generalization. It covers key concepts such as conformal field theory, string interactions, and the connection between QFT and gravity, emphasizing a representation-independent approach. With detailed derivations and a focus on both mathematical rigor and physical intuition, this book serves as a bridge between conventional QFT and modern developments in string theory, making it an essential resource for advanced students and researchers in theoretical physics.