TY  - JOUR
AU  - del Rio, A.
AU  - Navarro-Salas, J.
PY  - 2015
DA  - 2015//
TI  - Equivalence of adiabatic and DeWitt-Schwinger renormalization schemes
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 064031
EP  - 14pp
VL  - 91
IS  - 6
PB  - Amer Physical Soc
AB  - 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.
SN  - 1550-7998
UR  - http://arxiv.org/abs/1412.7570
UR  - https://doi.org/10.1103/PhysRevD.91.064031
DO  - 10.1103/PhysRevD.91.064031
LA  - English
N1  - WOS:000350966000005
ID  - delRio+Navarro-Salas2015
ER  -