openfermion.linalg.jw_sz_restrict_state

Restrict a Jordan-Wigner encoded state to a given Sz value

state(ndarray or sparse): Numpy vector in the space of n_qubits. sz_value(float): Desired Sz value. Should be an integer or half-integer. n_electrons(int, optional): Number of particles to restrict the operator to, if such a restriction is desired. n_qubits(int, optional): Number of qubits defining the total state up_index (Callable, optional): Function that maps a spatial index to the index of the corresponding up site down_index (Callable, optional): Function that maps a spatial index to the index of the corresponding down site

new_operator(ndarray or sparse): Numpy vector restricted to states with the desired Sz value. May not be normalized.