skip to main content

SciTech ConnectSciTech Connect

Title: On hyperbolicity violations in cosmological models with vector fields

Cosmological models with vector fields received much attention in recent years. Unfortunately, most of them are plagued with severe instabilities or other problems. In particular, it was noted in ref. [1] that the models with a non-linear function of the Maxwellian kinetic term do always imply violations of hyperbolicity somewhere in the phase space. In this work we make this statement more precise in several respects and show that those violations may not be present around spatially homogeneous configurations of the vector field.
Authors:
;  [1]
  1. Saint-Petersburg State University, high energy physics department, Ulyanovskaya ul., d. 1, Saint-Petersburg, Petrodvoretz, 198504 (Russian Federation)
Publication Date:
OSTI Identifier:
22370689
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 02; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGICAL MODELS; FUNCTIONS; INSTABILITY; NONLINEAR PROBLEMS; PHASE SPACE; VECTOR FIELDS