Functions to return <D_i | H | D_j> for both real and momentum space formulations of the Hubbard model.
Functions to return <D_i | H | D_j> for both real and momentum space formulations of the Hubbard model.

Note: real space function is only a dummy one currently.

hande-qmc/hande,hande-qmc/hande,hande-qmc/hande,hande-qmc/hande,ruthfranklin/hande,hande-qmc/hande