Transcription of Quantum Field Theory I - ETH Z
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Quantum Field Theory I - ETH Z
Quantum Field Theory IBabis AnastasiouInstitute for Theoretical Physics,ETH Zurich,8093 Zurich, 16, 2020 Contents1 Quantum Field Theory . Why?72 Review of principles of classical and Quantum Time evolution in classical mechanics .. of Poisson brackets .. way to think of classical time evolution .. Time evolution in Quantum mechanics .. Conservation and symmetries in classical mechanics .. classical example .. Symmetries in Quantum mechanics ..153 Theory of Classical Fields from a discretised space (lattice) .. Euler-Lagrange equations for a classical Field from a Lagrangian density . Noether s theorem .. Field symmetry transformations .. symmetry transformations.
the dynamics of simple mechanical systems in classical and quantum physics. In QFT, we will postulate principles that we have already seen there, such as the principle of least action and canonical quantization. Conservation theorems derived in classical and quantum mechanics will also apply to QFT. 2.1 Time evolution in classical mechanics
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