Speaker
Description
Motivated by the effectiveness of $f(Q)$ gravity models in fitting observational data at both background and perturbation levels, our study employs a comprehensive dynamical system analysis to independently validate these findings. We focus on two well-studied $f(Q)$ models, specifically the power-law and exponential variants. Our analysis reveals a matter-dominated saddle point in both cases, accurately exhibiting the expected matter perturbation growth rate. Subsequently, we observe a stable dark-energy-dominated accelerated universe, maintaining constant matter perturbations. Additionally, an examination of $f \sigma_8$ behavior demonstrates successful alignment with observational data, resembling the $\Lambda$CDM scenario, although the exponential model lacks this as a specific limit. This independent dynamical systems approach corroborates previous observational results, solidifying the potential of $f(Q)$ gravity as a promising alternative to the $\Lambda$CDM concordance model.
| jibitesh@nehu.ac.in | |
| Affiliation | nehu, shillong |
