193 citations · 1k across the 26 of their papers we have counts for
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Scalaron-Higgs inflation reloaded: Higgs-dependent scalaron mass and primordial black hole dark matter
Anirudh Gundhi, Christian F. Steinwachs
We propose an extension of the scalaron-Higgs model by a non-minimal coupling of the Standard Model Higgs boson to the quadratic Ricci scalar resulting in a Higgs-dependent scalaro…
Primordial black hole dark matter in dilaton-extended two-field Starobinsky inflation
Anirudh Gundhi, Sergei V. Ketov, Christian F. Steinwachs
We investigate the production of primordial black holes and their contribution to the presently observed dark matter in a dilaton two-field extension of Starobinsky's quadratic $f(…
Towards a unitary, renormalizable and ultraviolet-complete quantum theory of gravity
Christian F. Steinwachs
For any fundamental quantum field theory, unitarity, renormalizability, and relativistic invariance are considered to be essential properties. Unitarity is inevitably connected to…
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…