$AdS_2$ holography and ModMax

Abstract

We present a JT gravity set up in the presence of projected ModMax corrections in two dimensions. Our starting point is the Einstein's gravity in four dimensions accompanied by the ModMax Lagrangian. The 2D gravity action is obtained following a suitable dimensional reduction which contains a 2D image of the 4D ModMax Lagrangian. We carry out a perturbative analysis to find out the vacuum structure of the theory which asymptotes to $AdS_2$ in the absence of $U(1)$ gauge fields. We estimate the holographic central charge and obtain corrections perturbatively upto quadratic order in the ModMax and the $U(1)$ coupling. We also find out ModMax corrected 2D black hole solutions and discuss their extremal limits.