pith. sign in

arxiv: 1401.4024 · v2 · pith:FTKR46B2new · submitted 2014-01-16 · ✦ hep-th · gr-qc

The Null Energy Condition and its violation

V.A. Rubakov This is my paper
classification ✦ hep-th gr-qc
keywords theoriesconditionenergyfieldgivenulladmitcontext
0
0 comments X
read the original abstract

We give a mini-review of scalar field theories with second-derivative Lagrangians, whose field equations are second order. Some of these theories admit solutions violating the Null Energy Condition and having no obvious pathologies. We give a few examples of using these theories in cosmological setting and also in the context of the creation of a universe in the laboratory.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Affine ANEC selects the closed FRW branch for geodesically complete cosmology

    gr-qc 2026-05 unverdicted novelty 6.0

    Affine ANEC obstructs non-static flat and open FRW from being null geodesically complete while ANEC-satisfying, but allows explicit scalar-field realizations for closed FRW with NEC-respecting matter.

  2. Cosmic Strings as Dynamical Dark Energy: Novel Constraints

    astro-ph.CO 2025-05 conditional novelty 4.0

    Cosmic string networks are constrained to less than ~1% of the energy density using CMB+BAO+SN data, with some models preferring mildly negative densities but no Bayesian evidence favoring them over LambdaCDM.