scqubits.core.operators.hubbard_sparse#

scqubits.core.operators.hubbard_sparse(j1, j2, dimension)[source]#

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