3 papers
hep-th2026
Multiple Mellin-Barnes integrals in Schwinger-DeWitt technique
A. O. Barvinsky, A. E. Kalugin, W. Wachowski
We consider off-diagonal asymptotic series for integral kernels of functions of Laplace-type operators on curved backgrounds. These expansions are obtained by applying integral tra…
hep-th2024
Notes on peculiarities of Schwinger--DeWitt technique: one-loop double poles, total-derivative terms and determinant anomalies
Andrei O. Barvinsky, Alexey E. Kalugin
We discuss peculiarities of the Schwinger--DeWitt technique for quantum effective action, associated with the origin of dimensionally regularized double-pole divergences of the one…
hep-th2023
On the local term in the anomaly-induced action of Weyl quantum gravity
Andrei O. Barvinsky, Guilherme H. S. Camargo, Alexei E. Kalugin +2
The finite local conformally non-invariant -term emerges in the one-loop effective action of the model of quantum gravity based on the Weyl-squared classical action. This term…