ffsim.random.random_double_factorized_hamiltonian

ffsim.random.random_double_factorized_hamiltonian(norb, *, rank=None, z_representation=False, real=False, seed=None)[source]

Sample a random double-factorized Hamiltonian.

Parameters:

  • norb (int) – The number of spatial orbitals.

  • rank (int | None) – The desired number of terms in the two-body part of the Hamiltonian. If not specified, it will be set to norb * (norb + 1) // 2.

  • z_representation (bool) – Whether to return a Hamiltonian in the “Z” representation.

  • real (bool) – Whether to sample a real-valued object rather than a complex-valued one.

  • seed – A seed to initialize the pseudorandom number generator. Should be a valid input to np.random.default_rng.

Return type:

DoubleFactorizedHamiltonian

Returns:

The sampled double-factorized Hamiltonian.