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gr-qc2025
Cosmological phase-space analysis of -theories of gravity
Giannis Papagiannopoulos, Orlando Luongo, Genly Leon +1
The impact of topological terms that modify the Hilbert-Einstein action is here explored by virtue of a further contribution. In particular, we investigate the phase-space s…
gr-qc2025★ 2 cited
Avoiding Big Rip Singularities in Phantom Scalar Field theory with Gauss-Bonnet term
Giannis Papagiannopoulos, Genly Leon, Andronikos Paliathanasis
We consider a phantom scalar field coupled to the Gauss-Bonnet scalar within a spatially flat FLRW geometry. Moreover, we assume a nonzero interaction between the scalar field and…