Title Schwinger's Quantum Action Principle : From Dirac???s Formulation Through Feynman???s Path Integrals, the Schwinger-Keldysh Method, Quantum Field Theory, to Source Theory Author(s) Milton, Kimball A Publication Cham, Springer International Publishing, 2015. Description VIII, 116 p. 19 illus., 11 illus. in color : online resource Abstract Note 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,Price 9783319201283 Keyword(s) 1. EBOOK 2. EBOOK - SPRINGER 3. History and Philosophical Foundations of Physics 4. Mathematical Applications in the Physical Sciences 5. Mathematical Methods in Physics 6. MATHEMATICAL PHYSICS 7. PHYSICS 8. QUANTUM PHYSICS Item Type eBook Multi-Media Links Please Click here for eBook Circulation Data Accession#   Call# Status Issued To Return Due On Physical Location I06199     On Shelf