414 citations · 2.3k across the 70 of their papers we have counts for
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Quark-antiquark static energy from a restricted Fourier transform
Felix Karbstein
We provide a fully analytical determination of the perturbative quark-antiquark static energy in position space as defined by a restricted Fourier transformation from momentum to p…
The photon polarization tensor in a homogeneous magnetic or electric field
Felix Karbstein
We revisit the photon polarization tensor in a homogeneous external magnetic or electric field. The starting point of our considerations is the momentum space representation of the…
Quantum Reflection as a New Signature of Quantum Vacuum Nonlinearity
Holger Gies, Felix Karbstein, Nico Seegert
We show that photons subject to a spatially inhomogeneous electromagnetic field can experience quantum reflection. Based on this observation, we propose quantum reflection as a nov…
The Symmetries of the Three Heavy Quark Bound State and the Singlet Static Energy
Felix Karbstein
Potential non-relativistic QCD provides a convenient framework to study the three heavy-quark system. We have studied its symmetries under exchange of the heavy quarks and determin…
Symmetries of the Three Heavy-Quark System and the Color-Singlet Static Energy at NNLL
Nora Brambilla, Felix Karbstein, Antonio Vairo
We study the symmetries of the three heavy-quark system under exchange of the quark fields within the effective field theory framework of potential non-relativistic QCD. The symmet…