scqubits.core.operators.hubbard_sparse¶ scqubits.core.operators.hubbard_sparse(j1, j2, dimension)[source]¶ The Hubbard operator \(|j_1\rangle>\langle j_2|\) is returned as a matrix of linear size dimension. Parameters: dimension (int) j1 (int) – indices of the two states labeling the Hubbard operator j2 (int) – indices of the two states labeling the Hubbard operator Return type: csc_matrix Returns: sparse number operator matrix, size dimension x dimension