In f(Q,φ) gravity with nonminimal coupling, De Sitter inflation works only for 10^{-3} ≲ ξ ≲ 10^{-2} while a Cosh model gives ns ≈ 0.965-0.967 and r ≈ 0.017-0.018 at N=60, matching observations.
Cosmological Dynamics on a Novelf(Q) Gravity Model with Recent DESI DR2 Observation
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MCMC constraints on two Lambda(t) models with DESI DR2, CC, and Pantheon+ data yield H0 ~72.5-73 km/s/Mpc, Omega_m0 near standard values in joint fits, and n~0.3 indicating mild deviation from LambdaCDM.
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Inflationary Scenarios in $f(Q,\phi)$ Gravity with Scalar Field Coupling
In f(Q,φ) gravity with nonminimal coupling, De Sitter inflation works only for 10^{-3} ≲ ξ ≲ 10^{-2} while a Cosh model gives ns ≈ 0.965-0.967 and r ≈ 0.017-0.018 at N=60, matching observations.
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Observational tests of \texorpdfstring{$\Lambda(t)$}{Lambda(t)} cosmology in light of DESI DR2
MCMC constraints on two Lambda(t) models with DESI DR2, CC, and Pantheon+ data yield H0 ~72.5-73 km/s/Mpc, Omega_m0 near standard values in joint fits, and n~0.3 indicating mild deviation from LambdaCDM.