Quantum Field Theory (QFT) is a complex and advanced topic in theoretical physics. As a beginner, it is important to have a solid foundation in quantum mechanics and classical field theory before delving into QFT. Once you have a good grasp of those subjects, here are a few books that are often recommended for beginners in QFT:
"Quantum Field Theory for the Gifted Amateur" by Tom Lancaster and Stephen J. Blundell: This book provides an accessible introduction to QFT without assuming extensive mathematical background. It covers the basic concepts and techniques of QFT, focusing on the essentials while avoiding excessive mathematical formalism.
"Quantum Field Theory in a Nutshell" by A. Zee: This book offers an intuitive and conceptual approach to QFT. It covers a wide range of topics in QFT, including the basics of relativistic quantum mechanics, symmetries, Feynman diagrams, and the quantization of fields. It is known for its clear explanations and insightful discussions.
"An Introduction to Quantum Field Theory" by Michael E. Peskin and Daniel V. Schroeder: This book is more comprehensive and mathematically rigorous compared to the previous recommendations. It covers a wide range of topics in QFT, including quantization, renormalization, gauge theories, and the Standard Model. It is often used as a textbook in graduate-level courses.
"Quantum Field Theory for the Gifted Amateur" by David Morin: This book provides a gentle introduction to QFT, emphasizing conceptual understanding and physical insights. It covers the basics of QFT, including classical field theory, canonical quantization, Feynman diagrams, and scattering amplitudes. It is designed for self-study and includes a variety of exercises and problems.
Remember that QFT is a challenging subject, and it is often helpful to supplement your study with lecture notes, online resources, and practice problems. It is also beneficial to have a solid understanding of advanced mathematics, such as calculus, linear algebra, and differential equations.