REVIEW 6 cited by
A Primer on Energy Conditions
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
read the original abstract
An energy condition, in the context of a wide class of spacetime theories (including general relativity), is, crudely speaking, a relation one demands the stress-energy tensor of matter satisfy in order to try to capture the idea that "energy should be positive". The remarkable fact I will discuss in this paper is that such simple, general, almost trivial seeming propositions have profound and far-reaching import for our understanding of the structure of relativistic spacetimes. It is therefore especially surprising when one also learns that we have no clear understanding of the nature of these conditions, what theoretical status they have with respect to fundamental physics, what epistemic status they may have, when we should and should not expect them to be satisfied, and even in many cases how they and their consequences should be interpreted physically. Or so I shall argue, by a detailed analysis of the technical and conceptual character of all the standard conditions used in physics today, including examination of their consequences and the circumstances in which they are believed to be violated.
Forward citations
Cited by 6 Pith papers
-
Obstructions to Minimal Regular Black Hole Cosmologies
Obstructions from matching conditions and completeness theorems prevent minimal regular black hole models from hosting unbounded FRW daughter cosmologies.
-
Defocusing dark energy: Raychaudhuri diagnostics beyond $w<-1/3$ and the phantom divide
For sign-changing effective dark energy, smooth negative-to-positive density crossings make ρ+3p and ρ+p the correct diagnostics, give w=p/ρ a universal pole n(1+z†)/3, and force repulsion onset z_rep>z† while ρ<0.
-
Galactic dark matter halos: From anisotropic fluids in general relativity to Horava-Lifshitz gravity
A GR Hamiltonian deformation produces an anisotropic fluid that cannot flatten rotation curves, while Horava-Lifshitz produces the right dark-matter scaling only for an imposed power-law LTB ansatz with tight paramete...
-
Violations of the null convergence condition in kinematical transitions between singular and regular black holes, horizonless compact objects, and bounces
During kinematical transitions between singular and regular black holes, horizonless compact objects, and bounces, the null convergence condition is violated even when both endpoint spacetimes respect it.
-
Gravitational Waves from Primordial Black Holes formed by Null Energy Condition Violation during Inflation
A transient null-energy-condition violation during inflation is shown to produce a four-component gravitational-wave background — primordial, scalar-induced, PBH ringdown, and binary-merger — with only the solar-mass ...
-
Bouncing Cosmology in Interacting Scalar-Torsion Gravity
Two interacting scalar-torsion models are shown, by tuned numerical construction, to host a matter bounce with phantom equation of state and NEC violation at the bounce epoch.
Discussion (0). Continue with ORCID to comment.