Loop equations and topological recursion for the arbitrary-$\beta$   two-matrix model
  We write the loop equations for the $\beta$ two-matrix model, and we propose a topological recursion algorithm to solve them, order by order in a small parameter. We find that to leading order, the spectral curve is a "quantum" spectral curve, i.e. it is given by a differential operator (instead of an algebraic equation for the hermitian case). Here, we study the case where that quantum spectral curve is completely degenerate, it satisfies a Bethe ansatz, and the spectral curve is the Baxter TQ relation. 
Michel Berg\`ere, Bertrand Eynard, Olivier Marchal, Aleix Prats-Ferrer
math-ph hep-th math.MP