Stress tensor and current correlators of interacting conformal field theories in 2+1 dimensions: fermionic Dirac matter coupled to U(1) gauge field

Abstract

Abstract: We compute the central charge CT and universal conductivity CJ of NF fermions coupled to a U (1) gauge field up to next-to-leading order in the 1/NF expansion. We discuss implications of these precision computations as a diagnostic for response and entanglement properties of interacting conformal field theories for strongly correlated condensed matter phases and conformal quantum electrodynamics in 2 + 1 dimensions.