https://doi.org/10.1140/epjc/s10052-023-12316-x
Regular Article - Theoretical Physics
A new solution for a generalized cosmological wormhole
1
Instituto Argentino de Radioastronomía (IAR, CONICET/CIC/UNLP), Villa Elisa, C.C.5, (1894), Buenos Aires, Argentina
2
Department of Physics, Federal University of São Carlos, 13565-905, São Carlos, São Paulo, Brazil
3
Instituto Nacional de Pesquisas Espaciais, Av. dos Astronautas, 1758, Jardim da Granja, 12227-010, São José dos Campos, Brazil
a danielaperez@iar.unlp.edu.ar, daniela.perez2812@gmail.com
Received:
20
November
2023
Accepted:
1
December
2023
Published online:
14
December
2023
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.
© The Author(s) 2023
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3. SCOAP3 supports the goals of the International Year of Basic Sciences for Sustainable Development.
