TrigonometricSU(N) Richardson-Gaudin models and dissipative multi-level atomic systems

We derive the exact solution of a system ofN-level atoms in contact with a Markovian reservoir. The resulting Liouvillian expressed in a vectorized basis is mapped to anSU(N) trigonometric Richardson-Gaudin model whose exact solution is given by a set of non-linear coupled equations. ForN= 2 (SU(2)) we recover the exact solution of (2019Phys. Rev. Lett.122010401). We then study theSU(3) case for three-level atom systems and discuss the properties of the steady state and dissipative gaps for finite systems as well as for the thermodynamic limit.