Sumários
Perturbation theory
26 Abril 2023, 11:00 • Luís Bento
Fermion number operator and commutation relations with particle and anti-particle operators.
Schrödinger, Heisenberg and Dirac representations in quantum field theory. Time dependent perturbation theory. S matrix.
Spinor field quanti
21 Abril 2023, 11:00 • Luís Bento
Systems with constraints, Dirac brackets. The case of the electromagnetic field. Two fermion states, antisymmetry under exchange of particles. Quantization of the Dirac spinor.
Electromagnetic field quantization
19 Abril 2023, 11:00 • Luís Bento
Quantum electromagnetic field in vacuum. Photon creation and annhilation operators. Fock space. Matrix elements of the vector potential.