Variational reduced density matrix method in the doubly-occupied configuration interaction space using four-particle N-representability conditions: Application to the XXZ model of quantum magnetism

1. Rubio-Garciá, A.
2. Dukelsky, J.
3. Alcoba, D.R.
4. Capuzzi, P.
5. Onã, O.B.
6. Riós, E.
7. Torre, A.
8. Lain, L.