Instabilities and the null energy condition

We show that violation of the null energy condition implies instability in a broad class of models, including gauge theories with scalar and fermionic matter as well as any perfect fluid. When applied to the dark energy, our results imply that w=p/ρ is unlikely to be less than −1.

Saved in:
Bibliographic Details
Published in:Physics letters. B 2006-01, Vol.632 (4), p.543-546
Main Authors: Buniy, Roman V., Hsu, Stephen D.H.
Format: Article
Language:English
Subjects:
Exact sciences and technology
Nuclear physics
Physics
The physics of elementary particles and fields
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We show that violation of the null energy condition implies instability in a broad class of models, including gauge theories with scalar and fermionic matter as well as any perfect fluid. When applied to the dark energy, our results imply that w=p/ρ is unlikely to be less than −1.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2005.10.075