openfermion.utils.map_particle_hole_dm_to_one_pdm

Map the particle-hole-RDM to the 1-RDM

View aliases

Main aliases

openfermion.map_particle_hole_dm_to_one_pdm, openfermion.utils.rdm_mapping_functions.map_particle_hole_dm_to_one_pdm

openfermion.utils.map_particle_hole_dm_to_one_pdm(
    phdm, num_particles, num_basis_functions
)

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] == \(a_{p}^{\dagger}a_{q}a_{r}^{\dagger}a_{s}\).
`num_particles`	number of particles in the system.
`num_basis_functions`	number of spin-orbitals (usually the number of qubits)

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] == \(a_{p}^{\dagger}a_{q}a_{r}^{\dagger}a_{s}\).

num_particles number of particles in the system.

num_basis_functions number of spin-orbitals (usually the number of qubits)

Returns
`opdm`	`numpy.ndarray` the 1-RDM transformed from a 1-RDM.

Returns

opdm

numpy.ndarray

the 1-RDM transformed from a 1-RDM.

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Last updated 2025-06-06 UTC.