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Cited by 223Cosmology and Gravitation TheoriesNoncommutative and Quantum Gravity TheoriesBlack Holes and Theoretical Physics

The null energy condition and its violation

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Rubakov, V A·2014·Physics-Uspekhi
DOI 10.3367/ufne.0184.201402b.0137
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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.

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  • NEC violation is known in the case of the Casimir effect and has been shown for tunnelling between degenerate vacua.

    “An important feature related to the above finite-volume effects is the violation of the Null Energy Condition (NEC - see [18, 19] for reviews), which is known in the case of the Casimir effect, and which has been shown in [12, 13] for tunnelling between degenerate vacua.”

    From Double-well instantons in finite volume (2024) · cites this paper as [18]

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Authors
Rubakov, V. A.
Corresponding author
Rubakov, V A
Venue
Physics-Uspekhi
Publisher
Uspekhi Fizicheskikh Nauk (UFN) Journal
Published
2014-02-28
Volume
57
Issue
2
Pages
128-142
ISSN
  • 1063-7869 (ISSN-L)
  • 1468-4780
DOI
10.3367/ufne.0184.201402b.0137
OpenAlex
W2045215920
Cited by
223
References
11
Citations by year
2026: 15 · 2025: 24 · 2024: 35 · 2023: 21 · 2022: 13 · 2021: 15 · 2020: 16 · 2019: 15 · 2018: 21 · 2017: 21 · 2016: 16 · 2015: 8 · 2014: 3
FWCI
8.62
Type
journal article
Language
en
Open access
Licence
Locations
  • Physics-Uspekhi (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
  • Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Noncommutative and Quantum Gravity Theories
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Black Holes and Theoretical Physics
Keywords
null energy condition, null energy condition violation, scalar field theory, higher-derivative gravity, second-order field equations, cosmology, emergent spacetime

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