TY  - GEN
N2  - 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.
AB  - 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.
T1  - Schwinger's quantum action principlefrom Dirac's formulation through Feynman's path integrals, the Schwinger-Keldysh method, quantum field theory, to source theory /
AU  - Milton, K. A.,
CN  - QC174.45
ID  - 727711
KW  - Quantum field theory.
SN  - 9783319201283
SN  - 331920128X
TI  - Schwinger's quantum action principlefrom Dirac's formulation through Feynman's path integrals, the Schwinger-Keldysh method, quantum field theory, to source theory /
LK  - https://univsouthin.idm.oclc.org/login?url=http://link.springer.com/10.1007/978-3-319-20128-3
UR  - https://univsouthin.idm.oclc.org/login?url=http://link.springer.com/10.1007/978-3-319-20128-3
ER  -