scqubits.core.operators.hubbard_sparse

scqubits.core.operators.hubbard_sparse(j1, j2, dimension)

The Hubbard operator \(|j1\rangle>\langle j2|\) 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