Relativistic Quantum Mechanics and Introduction to Field Theory

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The book focuses on the quantum mechanics of particles through a relativistic lens, emphasizing the transition to quantum field theory when dealing with systems that have infinite degrees of freedom. It explores conditions where traditional quantum mechanics remains applicable, allowing the use of concepts like potentials and wave equations. The text includes a systematic discussion of one- and two-particle relativistic states, particularly in scattering processes, while also introducing quantum field theory as a means to connect with classical concepts and analyze radiation emission and fermion propagation in electromagnetic fields.