k-Essence, superluminal propagation, causality and emergent geometry

Details k-Essence, superluminal propagation, causality and emergent geometry k-Essence, superluminal propagation, causality and emergent geometry

2007-08-03

arxiv.org/abs/0708.0561v1

JHEP 0802:101,2008

Physics

High Energy Physics

High Energy Physics - Theory

34 pages, 5 figures

Scientific paper

10.1088/1126-6708/2008/02/101

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.

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