qml.to_openfermion¶
-
to_openfermion
(pennylane_op, wires=None, tol=1e-16)[source]¶ Convert a PennyLane operator to OpenFermion QubitOperator or FermionOperator.
- Parameters
pennylane_op (Sum, LinearCombination, FermiWord, FermiSentence) – PennyLane operator
wires (dict) – Custom wire mapping used to convert a PennyLane qubit operator to the external operator. Only dictionaries with integer keys (for qubit-to-wire conversion) are accepted. If
None
, the identity map (e.g.,0->0, 1->1, ...
) will be used.
- Returns
OpenFermion operator
- Return type
(QubitOperator, FermionOperator)
Example
>>> import pennylane as qml >>> w1 = qml.fermi.FermiWord({(0, 0) : '+', (1, 1) : '-'}) >>> w2 = qml.fermi.FermiWord({(0, 1) : '+', (1, 2) : '-'}) >>> fermi_s = qml.fermi.FermiSentence({w1 : 1.2, w2: 3.1}) >>> of_fermi_op = qml.to_openfermion(fermi_s) >>> of_fermi_op 1.2 [0^ 1] + 3.1 [1^ 2]
>>> sum_op = 1.2 * qml.X(0) + 2.4 * qml.Z(1) >>> of_qubit_op = qml.to_openfermion(sum_op) >>> of_qubit_op (1.2+0j) [X0] + (2.4+0j) [Z1]
code/api/pennylane.to_openfermion
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