368 citations · 8.9k across the 150 of their papers we have counts for
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An Addendum to the Heisenberg-Euler effective action beyond one loop
Holger Gies, Felix Karbstein
We study the effective interactions of external electromagnetic fields induced by fluctuations of virtual particles in the vacuum of quantum electrodynamics. Our main focus is on t…
Nonabelian Higgs models: paving the way for asymptotic freedom
Holger Gies, Luca Zambelli
Asymptotically free renormalization group trajectories can be constructed in nonabelian Higgs models with the aid of generalized boundary conditions imposed on the renormalized act…
Global flow of the Higgs potential in a Yukawa model
Julia Borchardt, Holger Gies, René Sondenheimer
We study the renormalization flow of the Higgs potential as a function of both field amplitude and energy scale. This overcomes limitations of conventional techniques that rely, e.…
Photon merging and splitting in electromagnetic field inhomogeneities
Holger Gies, Felix Karbstein, Nico Seegert
We investigate photon merging and splitting processes in inhomogeneous, slowly varying electromagnetic fields. Our study is based on the three-photon polarization tensor following…
The Gravitational Two-Loop Counterterm is Asymptotically Safe
Holger Gies, Benjamin Knorr, Stefan Lippoldt +1
Weinberg's asymptotic safety scenario provides an elegant mechanism to construct a quantum theory of gravity within the framework of quantum field theory based on a non-Gaußian fix…