Year: 2023
Type: preprint
Abstract: We find a new exact solution to Einstein field equations that represents a cosmological wormhole embedded in a flat Friedmann-Lemaître-Robertson-Walker universe. The new metric is a generalization of a previous cosmological wormhole solution found by Kim. We explicitly show that the flaring out condition is satisfied at the throat at all cosmic times; in addition, the null energy condition is violated at the throat regardless of the background cosmological model; thus, the spacetime geometry presented here describes a wormhole coupled to the cosmic dynamics that exists at all cosmic times and whose throat remains open in any cosmological model.
Source: arXiv (Cornell University)
Authors: Pérez, Daniela, Neto, Mário Raia
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4389767978