Spectral weight in Chern-Simons theory with symmetry breaking

Abstract

We calculate the low-energy spectral weight of a holographic superfluid coupled to a Chern-Simons term in IR radial scaling geometries characterized by a parameter $η$. This work was motivated by previous results where an unexpected low-energy spectral weight and a region of instability were seen, both at finite momentum, for the holographic superfluid. We characterize the effect of varying the Chern-Simons coupling $α$ and condensate charge parameter $ζ$ on these regions supporting low-energy spectral weight or a finite momentum instability. We show that $η$, $α$ and $ζ$ each plays a unique role in shaping these regions. We find a surface $α_{\text{crit}}(η, ζ)$ above which the theory is unstable. In the longitudinal channel we extend our analysis to general dimension $d$. We briefly analyze the Einstein-Maxwell-dilaton theory and find that Fermi shells exist for $d>4$.