openfermion.utils.map_particle_hole_dm_to_two_pdm

Map the 2-RDM to the particle-hole-RDM

Main aliases

openfermion.utils.map_particle_hole_dm_to_two_pdm(
    phdm, opdm
)

Args
phdm (numpy.ndarray): The 2-particle-hole-RDM as a 4-index tensor. Indices follow the internal convention of phdm[p, q, r, s] == :math:`a_{p}^{\dagger}a_{q}a_{r}^{\dagger}a_{s}`. opdm (numpy.ndarray): The 1-RDM as a 2-index tensor. Indices follow the internal convention of opdm[p, q] == :math:`a_{p}^{\dagger}a_{q}`.

Returns
tpdm (numpy.ndarray): The 2-RDM matrix.

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Last updated 2021-03-10 UTC.

Args