Cosmological stability in f(ϕ,G) gravity
In gravitational theories where a canonical scalar field ϕ with a potential V(ϕ) is coupled to a Gauss-Bonnet (GB) term G with the Lagrangian f(ϕ,G), we study the cosmological stability of tensor and scalar perturbations in the presence of a perfect fluid. We show that, in decelerating cosmological...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269323000850 |