1269 K
35 pp.
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TitleThe Theory of Quantized Fields. III
Author(s)Schwinger, J.
Publication DateMay 1953
Report NumberNP-4565
Unique IdentifierACC0112
Other NumbersOSTI ID: 4368814
Research OrgHarvard University, Cambridge, Mass.
Contract No6N-onr-24806
Sponsoring OrgUS Atomic Energy Commission (AEC)
SubjectField Theory
KeywordsPhysics; Currents; Eigenfunctions; Eigenvalues; Electrodynamics; Electromagnetic Fields; Energy; Field Theory; Mathematics; Momentum; Photons; Quantum Electrodynamics; Quantum Mechanics
Related Web PagesJulian Schwinger and the Source Theory
AbstractIn this paper we discuss the electromagnetic field, as perturbed by a prescribed current. All quantities of physical interest in various situations, eigenvalues, eigenfunctions, and transformation probabilities, are derived from a general transformation function which is expressed in a non-Hermitian representation. The problems treated are: the determination of the energy-momentum eigenvalues and eigenfunctions for the isolated electromagnetic field, and the energy eigenvalues and eigenfunctions for the field perturbed by a time-independent current that departs from zero only within a finite time interval, and for a time-dependent current that assumes non-vanishing time-independent values initially and finally. The results are applied in a discussion of the intra-red catastrophe and of the adiabatic theorem. It is shown how the latter can be exploited to give a uniform formulation for all problems requiring the evaluation of transition probabilities or eigenvalue displacements.
1269 K
35 pp.
View Document 

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