Revisiting wormhole energy conditions in Riemann-Cartan spacetimes and under Weyl transformations
arXiv:1812.05318 · doi:10.1103/PhysRevD.98.124010
Abstract
We show that the violation of the null energy condition by matter, required by traversable wormholes, can be removed in spacetimes with torsion. In addition, we show that this violation can also be removed in the conformal frame obtained by a Weyl transformation. This comes about because both conformally transformed wormholes and wormholes in spacetimes with torsion become sustained thanks to a combination of 'normal' matter, that satisfies the null energy condition, and an induced 'geometric' energy-momentum tensor that is able to greatly violate the null energy condition.
11 pages
References in corpus (7)
- Spin, torsion and violation of null energy condition in traversable wormholes
- Spacetime thermodynamics in the presence of torsion
- Raychaudhuri equation in spacetimes with torsion
- Non-minimal Coupling of Torsion-matter Satisfying Null Energy Condition for Wormhole Solutions
- Revisiting the Brans solutions of scalar-tensor gravity
- More on the conformal mapping of quasi-local masses: The Hawking-Hayward case
- Conformal mapping of the Misner-Sharp mass from gravitational collapse
Cited by in corpus (5)
- Noether charge and black hole entropy in teleparallel gravity
- Dynamical wormholes in Lovelock gravity
- More on spacetime thermodynamics in the light of Weyl transformations
- How appropriate are the gravitational entropy proposals for traversable wormholes?
- What can we learn from the conformal noninvariance of the Klein-Gordon equation?