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k-Essence, superluminal propagation, causality and emergent geometry

Authors :
Babichev, Eugeny
Mukhanov, Viatcheslav
Vikman, Alexander
Source :
JHEP 0802:101,2008
Publication Year :
2007

Abstract

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 paradoxes do not arise in these theories and in this respect they are not less safe than General Relativity.<br />Comment: 34 pages, 5 figures

Subjects

Subjects :
High Energy Physics - Theory
Astrophysics
General Relativity and Quantum Cosmology

Details

Database :
arXiv
Journal :
JHEP 0802:101,2008
Publication Type :
Report
Accession number :
edsarx.0708.0561
Document Type :
Working Paper
Full Text :
https://doi.org/10.1088/1126-6708/2008/02/101
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