transfer_vertex_to_fermion
transfer_vertex_to_fermion(inter_op)
Map a TransferVertexOperator to a FermionOperator.
Parameters
inter_op – the transfer-vertex operator to map.
Returns
The mapped fermionic operator.
Definition
This function decomposes the transfer-vertex operators in terms of the fermionic action operators as defined here.
Usage
>>> from qiskit_fermions.mappers.library import transfer_vertex_to_fermion
>>> from qiskit_fermions.operators import TransferVertexOperator
>>> inter_op = TransferVertexOperator.from_dict({((0, 0),): 1, ((1, 2),): 2, ((2, 1),): -2})
>>> fer_op = transfer_vertex_to_fermion(inter_op)
>>> print(format(fer_op.normal_ordered().simplify()))
1.000000e0 +0.000000e0j * ()
-2.000000e0 +0.000000e0j * (-2 -1)
-2.000000e0 +0.000000e0j * (+0 -0)
2.000000e0 -0.000000e0j * (+2 +1)