5 papers
Reply to "Bouncing Universes and their perturbations: remarks on a toy model"
Jerome Martin, Patrick Peter
In this web note, we reply to a recent paper, gr-qc/0404126, confirming a previous work of ours in which a cosmological bouncing phase was shown to have the ability of modifying th…
Perturbations in the Ekpyrotic Scenarios
Patrick Peter, Jerome Martin, Nelson Pinto-Neto +1
With the new cosmological data gathered over the last few years, the inflationary paradigm has seen its predictions largely unchallenged. A recent proposal, called the ekpyrotic sc…
Fermionic current-carrying cosmic strings: zero-temperature limit and equation of state
P. Peter, C. Ringeval
The equation of state for a superconducting cosmic string whose current is due to fermionic zero modes is derived analytically in the case where the back-reaction of the fermions t…
Lorentz gauge fixing and lattice QED
I. L. Bogolubsky, V. K. Mitrjushkin, M. Muller-Preussker +2
The Gribov ambiguity problem is studied for compact lattice QED within the Lorentz gauge. In the Coulomb phase, Gribov copies are mainly caused by double Dirac sheets and zero-mome…
Current-carrying string loop motion: Limits on the classical description and shocks
X. Martin, P. Peter
The dynamical evolution of superconducting cosmic strings is much more complicated than that of simple Goto-Nambu strings. For this reason, there are only a few known analytical so…