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In this work we investigate the possibility of constraining a thawingQuintessence scalar field model for dark energy. We propose using the imprintof baryon acoustic oscillation (BAO) on the cross-correlation ofpost-reionization 21-cm signal and galaxy weak lensing convergence field totomographically measure the angular diameter distance $D_A(z)$ and the Hubbleparameter $H(z)$. The projected errors in these quantities are then used toconstrain the Quintessence model parameters. We find that independent $600$hrsradio interferometric observation at four observing frequencies $916 $MHz,$650$ MHz, $520$ MHz and $430 $MHz with a SKA-1-Mid like radio telescope incross-correlation with a deep weak lensing survey covering half the sky maymeasure the binned $D_A$ and $H$ at a few percent level of sensitivity. TheMonte Carlo analysis for a power law thawing Quintessence model gives the$1-\sigma$ marginalized bounds on the initial slope $\lambda_i$,dark energydensity parameter $\Omega_{\phi 0}$ and the shape of the potential $\Gamma$ at8.63%, 10.08% and 9.75% respectively. The constraints improve to 7.66%, 4.39%and 5.86% respectively when a joint analysis with SN and other probes isperformed.

Probing Quintessence using BAO imprint on the cross-correlation of weak lensing and post-reionization HI 21 cm signal