Spin-constrained Hartree-Fock and the generator coordinate method for the 2-site Hubbard model

Stijn De Baerdemacker, Amir Ayati, Hugh G. A. Burton +3

We present a mathematical analysis of the spin-constrained Hartree-Fock solutions (CHF) of the 2-site Hubbard model. The analysis sheds light on the spin symmetry breaking process…