## Universal properties of the U(1) current at deconfined quantum critical points: Comparison with predictions from gauge-gravity duality

The deconfined quantum critical point of a two-dimensional SU(N) antiferromagnet is governed by an Abelian Higgs model in d=2+1 spacetime dimensions featuring N complex scalar fields. In this context, we derive for 2{<=}d{<=}4 an exact formula for the central charge of the U(1) current in terms of the gauge coupling at quantum criticality and compare it with the corresponding result obtained using gauge-gravity duality. There is a remarkable similarity precisely for d=2+1. In this case the amplitude of the current correlation function has the same form as predicted by the gauge-gravity duality. We also compare finite temperature results for themore »