Starting from the earlier notions of stationary action principles, these tutorial notes shows how Schwinger’s Quantum Action Principle descended from Dirac’s formulation, which independently led Feynman to his path-integral formulation of quantum mechanics. Part I brings out in more detail the connection between the two formulations, and applications are discussed. Then, the Keldysh-Schwinger time-cycle method of extracting matrix elements is described. Part II will discuss the variational formulation of quantum electrodynamics and the development of source theory.
- ISBN: 978-3-319-20127-6
- Editorial: Springer
- Encuadernacion: Rústica
- Fecha Publicación: 08/08/2015
- Nº Volúmenes: 1
- Idioma: Inglés