The null energy condition and its violation

A brief review is given of scalar field theories with second-derivative Lagrangians yielding second-order field equations. Some of these theories permit solutions that violate the null energy condition but otherwise show no obvious inconsistencies. The use of these theories in constructing cosmologi...

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Bibliographic Details
Published in:Physics Uspekhi 2014-01, Vol.57 (2), p.128-142
Main Author: Rubakov, V A
Format: Article
Language:English
Subjects:
Construction
Field theory
Mathematical analysis
Scalars
Universe
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Summary:A brief review is given of scalar field theories with second-derivative Lagrangians yielding second-order field equations. Some of these theories permit solutions that violate the null energy condition but otherwise show no obvious inconsistencies. The use of these theories in constructing cosmological scenarios and in the context of a laboratory-created universe is illustrated with examples.
ISSN:1063-7869
1468-4780
DOI:10.3367/UFNe.0184.201402b.0137