Constraints on $f(Q)$ logarithmic model using gravitational wave standard sirens

TL;DR

This paper investigates a logarithmic $f(Q)$ gravity model's ability to explain cosmic acceleration and its deviations from general relativity using current and future gravitational wave standard siren data, aiming to test its viability as a cosmological model.

Contribution

It introduces and constrains a logarithmic $f(Q)$ gravity model using observational data and simulated gravitational wave standard sirens, assessing its potential to explain cosmic acceleration and deviations from GR.

Findings

The model can explain late-time cosmic acceleration geometrically.

Future gravitational wave data can measure $H_0$ and $\

Deviations from GR could be significant at $z=1$, exceeding 13-18% with future data.

Abstract

In this paper, we study the constraints on the $f(Q)=Q/(8\pi G) - \alpha \ln(Q/Q_0)$, symmetric teleparallel model using local measurements and gravitational wave mock standard sirens. Using observational local SNIa and BAO data and energy conditions, the logarithmic $f(Q)$ model is capable of explaining the cosmic late-time acceleration by geometrical means. This result suggests that the logarithmic symmetric teleparallel model could be a candidate to solve the cosmological constant problem. In the case of the simulated standard siren data, by using the performance of the future ET and LISA detectors, we expect to be able to measure the current Hubble constant $H_0$, and the matter content $\Omega_m$, with a precision better than 1\% and 6\%, respectively. Furthermore, we explore the predicted $f(Q)$ logarithmic model deviation from the standard GR using ET and LISA mock standard sirens. The ratio $d_L^{\text{gw}}(z)/d_L^{\text{em}}(z)$, which quantifies the deviation from GR gives us a significant deviation higher than 13\% at $z=1$, and it continues growing to reach a deviation higher than 18\% in its median value. Future standard siren data will be able to quantify the strength of the deviation from GR and hence whether a cosmology like the one implied by this $f(Q)$ model is feasible.