Cosmology in f(Q)f(Q)f(Q) gravity: A unified dynamical system analysis at background and perturbation levels (original) (raw)

This research investigates the viability of cosmological models based on f(Q)f(Q)f(Q) gravity through a unified dynamical system analysis at both background and perturbation levels. By examining power-law and exponential models, the findings demonstrate that both models effectively establish a matter-dominated saddle point leading to a transition to a stable dark-energy dominated universe, aligning closely with observational data. Notably, while the exponential model does not converge to the ΛCDM scenario, it still presents a compelling alternative, verifying the promise of f(Q)f(Q)f(Q) gravity as a potential solution to existing cosmological issues.