https://doi.org/10.1140/epjp/s13360-025-06960-3
Comment
Revisiting wormhole solutions in Unimodular Gravity: energy conditions and exotic matter requirements
1
Departamento de Física, Universidad del Bío-Bío, Casilla 5-C, Avenida Collao 1202, Concepción, Chile
2
Departamento de Física, Universidad de Santiago de Chile, Avenida Ecuador 3493, Santiago, Chile
3
Center for Interdisciplinary Research in Astrophysics and Space Exploration (CIRAS), Universidad de Santiago de Chile, Av. Libertador Bernardo O’Higgins 3363, Estación Central, Chile
a
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Received:
6
May
2025
Accepted:
14
October
2025
Published online:
22
October
2025
Abstract
The paper entitled “Unimodular Gravity Traversable Wormholes” by Agrawal et al. examined the properties of barotropic wormholes without tidal forces within the framework of Unimodular Gravity. This comment demonstrates that their conclusion regarding the possibility of sustaining such wormhole configurations with ordinary matter is not entirely accurate. We establish that exotic matter remains necessary for these wormhole solutions in Unimodular Gravity, in accordance with the long-established theoretical constraints already identified in General Relativity.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
