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gr-qc2026
Causality Violating Solutions in Curvature-Squared Gravity
J. C. R. de Souza, A. F. Santos, R. Bufalo
In this paper, we consider some causality violating solutions in the curvature-squared gravity in order to examine whether closed timelike curves (CTCs) are allowed in these models…
gr-qc2025
Gödel-type universes in unimodular gravity
R. Raimarda, A. F. Santos, R. Bufalo
In this paper, the Gödel-type universes are examined within the framework of unimodular gravity. Since the existence of Gödel solutions is intrinsically related to the presence of…