Entanglement in Typical States of Chern-Simons Theory

Abstract: We compute various averages over bulk geometries of quantum states prepared by the Chern-Simons path integral, for any level $k$ and compact gauge group $G$. We do so by carefully summing over all topologically distinct bulk geometries which have $n$ disjoint boundary tori and a decomposition into space$\times$time of fixed spatial topology. We find that the typical state is unentangled across any bipartition of the tori defining the boundary Hilbert space, to leading order in the complexity defining the state. This is contrary to expectations from three-dimensional gravity. Additionally, we compute an averaged wave function which captures the leading order statistics of boundary observables in the $n$ torus Chern-Simons Hilbert space. We show that this averaged state is a separable state, which implies that different boundary tori only share classical correlations for complex enough bulk geometries.