37 citations · 214 across the 14 of their papers we have counts for
14 papers
Spectral Methods for Coupled Channels with a Mass Gap
H. Weigel, M. Quandt, N. Graham
We develop a method to compute the vacuum polarization energy for coupled scalar fields with different masses scattering off a background potential in one space dimension. As an ex…
Isospin Invariance and the Vacuum Polarization Energy of Cosmic Strings
H. Weigel, M. Quandt, N. Graham
We corroborate the previously applied spectral approach to compute the vacuum polarization energy of string configurations in models similar to the standard model of particle physi…
Quantum Stabilization of Cosmic Strings
H. Weigel, M. Quandt, N. Graham
In the standard model, stabilization of a classically unstable cosmic string may occur through the quantum fluctuations of a heavy fermion doublet. We review numerical results from…
Coulomb vs. physical string tension on the lattice
G. Burgio, M. Quandt, H. Reinhardt +1
From continuum studies it is known that the Coulomb string tension gives an upper bound for the physical (Wilson) string tension [D. Zwanziger, Phys. Rev. Lett. 90, 102…
On the Casimir Energy of Frequency Dependent Interactions
N. Graham, M. Quandt, H. Weigel
Vacuum polarization (or Casimir) energies can be straightforwardly computed from scattering data for static field configurations whose interactions with the fluctuating field are f…
Ghost propagator and the Coulomb form factor from the lattice
G. Burgio, M. Quandt, H. Reinhardt
We calculate the Coulomb ghost propagator G(|p|) and the static Coulomb potential V_C(|r|) for SU(2) Yang-Mills theory on the lattice. In view of possible scaling violations relate…