Impurity solvers

• CT-QMC: ALPS/CT-HYB
• CT-QMC: TRIQS/cthyb
• CT-QMC with segment implementation: ALPS/CT-HYB-SEGMENT
• Hubbard-I approximation: TRIQS/hubbard-I
• Exact diagonalization solver: pomerol
• Non-interacting limit: null
• How to integrate your own solver