%0 Journal Article
%T Equivalence of adiabatic and DeWitt-Schwinger renormalization schemes
%A del Rio, A.
%A Navarro-Salas, J.
%J Physical Review D
%D 2015
%V 91
%N 6
%I Amer Physical Soc
%@ 1550-7998
%G English
%F delRio+Navarro-Salas2015
%O WOS:000350966000005
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2150), last updated on Thu, 09 Apr 2015 15:40:13 +0000
%X We prove that adiabatic regularization and DeWitt-Schwinger point-splitting provide the same result when renormalizing expectation values of the stress-energy tensor for spin-1/2 fields. This generalizes the equivalence found for scalar fields, which is here recovered in a different way. We also argue that the coincidence limit of the DeWitt-Schwinger proper time expansion of the two-point function agrees exactly with the analogous expansion defined by the adiabatic regularization method at any order (for both scalar and spin-1/2 fields). We also illustrate the power of the adiabatic method to compute higher order DeWitt coefficients in Friedmann-Lemaitre-Robertson-Walker Universes.
%R 10.1103/PhysRevD.91.064031
%U http://arxiv.org/abs/1412.7570
%U https://doi.org/10.1103/PhysRevD.91.064031
%P 064031-14pp