193 citations · 1k across the 26 of their papers we have counts for
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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…
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…
Quantum gravitational corrections from the Wheeler-DeWitt equation for scalar-tensor theories
Christian F. Steinwachs, Matthijs L. van der Wild
We perform the canonical quantization of a general scalar-tensor theory and derive the first quantum gravitational corrections following from a semi-classical expansion of the Whee…
Quantum equivalence of gravity and scalar-tensor theories
Michael S. Ruf, Christian F. Steinwachs
We investigate whether the classical equivalence of gravity and its formulation as scalar-tensor theory still holds at the quantum level. We explicitly compare the correspon…
One-loop divergences for gravity
Michael S. Ruf, Christian F. Steinwachs
We calculate the divergent part of the one-loop effective action for gravity on an arbitrary background manifold. Our result generalizes previous results for quantum correct…
What can quantum cosmology say about the inflationary universe?
Gianluca Calcagni, Claus Kiefer, Christian F. Steinwachs
We propose a method to extract predictions from quantum cosmology for inflation that can be confronted with observations. Employing the tunneling boundary condition in quantum geom…