A Calogero formulation for four-dimensional black-hole micro states

We extract the leading-order entropy of a four-dimensional extremal black hole in $\mathcal{N}=2$ ungauged supergravity by formulating the CFT${}_1$ that is holographically dual to its near-horizon AdS${}_2$ geometry, in terms of a rational Calogero model with a known counting formula for the degeneracy of states in its Hilbert space.