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Compute the commutator of two-body operators provided that both are
openfermion.transforms.commutator_ordered_diagonal_coulomb_with_two_body_operator( operator_a, operator_b, prior_terms=None )
normal-ordered and that the first only has diagonal Coulomb interactions.
||The first FermionOperator argument of the commutator. All terms must be normal-ordered, and furthermore either hopping operators (i^ j) or diagonal Coulomb operators (i^ i or i^ j^ i j).|
||The second FermionOperator argument of the commutator. operator_b can be any arbitrary two-body operator. prior_terms (optional): The initial FermionOperator to add to.|
|The commutator, or the commutator added to prior_terms if provided.|
The function could be readily extended to the case of arbitrary two-body operator_a given that operator_b has the desired form; however, the extra check slows it down without desirable added utility.