openfermion.transforms.get_interaction_operator
Convert a 2-body fermionic operator to InteractionOperator.
openfermion.transforms.get_interaction_operator(
fermion_operator, n_qubits=None
)
This function should only be called on fermionic operators which
consist of only a_p^\dagger a_q and a_p^\dagger a_q^\dagger a_r a_s
terms. The one-body terms are stored in a matrix, one_body[p, q], and
the two-body terms are stored in a tensor, two_body[p, q, r, s].
Returns |
interaction_operator
|
An instance of the InteractionOperator class.
|
Raises |
TypeError
|
Input must be a FermionOperator.
|
TypeError
|
FermionOperator does not map to InteractionOperator.
|
Warning |
Even assuming that each creation or annihilation operator appears
at most a constant number of times in the original operator, the
runtime of this method is exponential in the number of qubits.
|
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Last updated 2024-04-26 UTC.
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