openfermion.utils.map_one_pdm_to_one_hole_dm

Convert a 1-RDM to a 1-hole-RDM

opdm (numpy.ndarray): The 1-RDM as a 2-index tensor. Indices follow the internal convention of opdm[p, q] == $a_{p}^{\dagger}a_{q}$.

oqdm (numpy.ndarray): the 1-hole-RDM transformed from a 1-RDM.