Spectrum continuity and level repulsion: the Ising CFT from infinitesimal to finite $\mathbf{\epsilon }$

Johan Henriksson, Stefanos R. Kousvos, Marten Reehorst

Using numerical conformal bootstrap technology we perform a non-perturbative study of the Ising CFT and its spectrum from infinitesimal to finite values of $\epsilon =4-d$. Explo…