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gr-qc2026
Geometric origin of the cosmological constant from Einstein-Chern-Simons gravity compactified to four dimensions
M. Cataldo, S. Lepe, C. Riquelme +1
We present a model in which the cosmological constant emerges as a purely geometric effect from the four-dimensional compactification of five-dimensional Einstein-Chern-Simons grav…
gr-qc2026★ 1 cited
Can wormhole spacetimes in Unimodular Gravity be supported by ordinary matter? A general proof of the exotic matter requirement
Mauricio Cataldo, Norman Cruz, Patricio Salgado
We establish a general no--go theorem demonstrating that all traversable wormhole configurations in Unimodular Gravity necessarily require exotic matter. The proof relies solely on…
gr-qc1996★ 69 cited
Static Einstein-Maxwell Solutions in 2+1 dimensions
Mauricio Cataldo, Patricio Salgado
We obtain the Einstein-Maxwell equations for (2+1)-dimensional static space-time, which are invariant under the transformation . It is…