ffsim.qiskit.ffsim_vec_to_qiskit_vec¶

ffsim.qiskit.ffsim_vec_to_qiskit_vec(vec, norb, nelec)[source]¶

Convert an ffsim state vector to a Qiskit state vector.

Parameters:

vec (ndarray) – A state vector in ffsim/PySCF format. It should be a one-dimensional vector of length comb(norb, n_alpha) * comb(norb, n_beta) in the spinful case, and comb(norb, nelec) in the spinless case.
norb (int) – The number of spatial orbitals.
nelec (int | tuple[int, int]) – Either a single integer representing the number of fermions for a spinless system, or a pair of integers storing the numbers of spin alpha and spin beta fermions.

Return type:

ndarray