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.

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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)