Zobrazeno 1 - 10
of 291
pro vyhledávání: '"Quandt, M."'
Publikováno v:
Phys. Rev. D 97, 036017 (2018)
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 example we consider the vacuum polarization energy of a kink-like solito
Externí odkaz:
http://arxiv.org/abs/1712.04898
Within a slightly simplified version of the electroweak standard model we investigate the stabilization of cosmic strings by fermion quantum fluctuations. Previous studies of quantum energies considered variants of the Nielsen-Olesen profile embedded
Externí odkaz:
http://arxiv.org/abs/1706.07071
Autor:
Reinhardt, H., Burgio, G., Campagnari, D., Ebadati, E., Heffner, J., Quandt, M., Vastag, P., Vogt, H.
I report on recent results obtained within the Hamiltonian approach to QCD in Coulomb gauge. Furthermore this approach is compared to recent lattice data, which were obtained by an alternative gauge fixing method and which show an improved agreement
Externí odkaz:
http://arxiv.org/abs/1706.02702
Autor:
Reinhardt, H., Burgio, G., Campagnari, D., Ebadati, E., Heffner, J., Quandt, M., Vastag, P., Vogt, H.
I report on recent results obtained within the Hamiltonian approach to QCD in Coulomb gauge. By relating the Gribov confinement scenario to the center vortex picture of confinement it is shown that the Coulomb string tension is tied to the spatial st
Externí odkaz:
http://arxiv.org/abs/1609.09370
I will review essential features of the Hamiltonian approach to QCD in Coulomb gauge showing that Gribov's confinement scenario is realized in this gauge. For this purpose I will discuss in detail the emergence of the horizon condition and the Coulom
Externí odkaz:
http://arxiv.org/abs/1607.08143
Publikováno v:
Phys. Rev. D 94, 045015 (2016)
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 physics. The central observation underlying this corroboration is the exist
Externí odkaz:
http://arxiv.org/abs/1605.09111
The variational Hamiltonian approach to QCD in Coulomb gauge is reviewed and the essential results obtained in recent years are summarized. First the results for the vacuum sector are discussed, with a special emphasis on the mechansim of confinement
Externí odkaz:
http://arxiv.org/abs/1510.03286
Publikováno v:
Mod. Phys. Lett., A30 (2015) 1530022
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 a semiclassical expansion in a reduced version of the standard model.
Externí odkaz:
http://arxiv.org/abs/1505.07631
Publikováno v:
Phys. Rev. D 92, 034518 (2015)
From continuum studies it is known that the Coulomb string tension $\sigma_C$ gives an upper bound for the physical (Wilson) string tension $\sigma_W$ [D. Zwanziger, Phys. Rev. Lett. 90, 102001 (2003)]. How does however such relationship translate to
Externí odkaz:
http://arxiv.org/abs/1503.09064
Publikováno v:
Phys. Rev. D 90, 085004 (2014)
Vacuum polarization (or Casimir) energies can be straightforwardly computed from scattering data for static field configurations whose interactions with the fluctuating field are frequency independent. In effective theories, however,such interactions
Externí odkaz:
http://arxiv.org/abs/1406.0748