88 citations · 88 across the 1 of their papers we have counts for
6 papers
Naked singularities in quadratic f(R) gravity
Enrique Hernandéz-Lorenzo, Christian F. Steinwachs
We find new static, spherically symmetric, and asymptotically flat vacuum solutions without horizon in Starobinsky's quadratic f(R) gravity. We systematically classify these soluti…
Combinatorial aspects in the one-loop renormalization of higher derivative theories
Christian F. Steinwachs
An efficient way to calculate one-loop counterterms within the Feynman diagrammatic approach and dimensional regularization is to expand the propagators in the integrands of the Fe…
Geometrized quantum Galileons
Lavinia Heisenberg, Christian F. Steinwachs
We investigate the renormalization structure of the scalar Galileon model in flat spacetime by calculating the one-loop divergences in a closed geometric form. The geometric formul…
One-loop renormalization in Galileon effective field theory
Lavinia Heisenberg, Christian F. Steinwachs
We investigate the renormalization structure of scalar Galileons in flat spacetime. We explicitly calculate the ultraviolet divergent one-loop contributions to the 2-point, 3-point…
Quantum gravitational corrections to the inflationary power spectra in scalar-tensor theories
Christian F. Steinwachs, Matthijs L. van der Wild
We derive the first quantum gravitational corrections to the inflationary power spectra for a general single-field scalar-tensor theory which includes a non-minimal coupling to gra…
One-loop divergences for gravity non-minimally coupled to a multiplet of scalar fields: calculation in the Jordan frame. I. The main results
Christian F. Steinwachs, Alexander Yu. Kamenshchik
Using the generalized Schwinger-DeWitt technique, we calculate the divergent part of the one-loop effective action for gravity non-minimally coupled to a multiplet of scalar fields…