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Lecture
Are you an EPFL student looking for a semester project?
Work with us on data science and visualisation projects, and deploy your project as an app on top of Graph Search.
This lecture covers the concept of asymptotic states and S-matrix in quantum field theory, focusing on the evolution of wave packets and the scattering states. The instructor explains the importance of discrete symmetries and the role of S-matrix in potential scattering. The lecture delves into the formalism of S-matrix elements and their relation to the Lippmann-Schwinger equation, emphasizing the unitarity of the S-matrix. Additionally, the lecture discusses the measurement in quantum mechanics, spin preparation, and the possibilities of spin states. The content also includes the application of the S-matrix in understanding the interaction amplitudes and the unitarity of the theory.