2 papers
gr-qc2021
Divergent part of the stress-energy tensor for Maxwell's theory in curved space-time: a systematic derivation
Roberto Niardi, Giampiero Esposito, Francesco Tramontano
In this paper the Feynman Green function for Maxwell's theory in curved space-time is studied by using the Fock-Schwinger-DeWitt asymptotic expansion; the point-splitting method is…
hep-th2021
Gauge Field Theories and Propagators in Curved Space-Time
Roberto Niardi
In this paper DeWitt's formalism for field theories is presented; it provides a framework in which the quantization of fields possessing infinite dimensional invariance groups may…