Schwinger's Principle and Gauge Fixing in the Free Electromagnetic Field
arXiv:hep-th/0502229 · doi:10.1393/ncb/i2006-10014-1
Abstract
A manifestly covariant treatment of the free quantum eletromagnetic field, in a linear covariant gauge, is implemented employing the Schwinger's Variational Principle and the B-field formalism. It is also discussed the abelian Proca's model as an example of a system without constraints.
arXiv comment8 pages. Format PTPtex. No figure