491 citations · 6.8k across the 96 of their papers we have counts for
3 papers · 1 filter
Gauge k-vortices
E. Babichev
We consider gauge vortices in symmetry breaking models with a non-canonical kinetic term. This work extends our previous study on global topological k-defects (hep-th/0608071), inc…
k-Essence, superluminal propagation, causality and emergent geometry
Eugeny Babichev, Viatcheslav Mukhanov, Alexander Vikman
The k-essence theories admit in general the superluminal propagation of the perturbations on classical backgrounds. We show that in spite of the superluminal propagation the causal…
Looking beyond the horizon
Eugeny Babichev, Viatcheslav Mukhanov, Alexander Vikman
In this short talk we review our results from the paper hep-th/0604075 with the main stress on the issues of causality and acoustic metric in eikonal approximation. In addition we…