def get_sparse_operator(operator, n_qubits=None):
"""Map a Fermion, Qubit, or InteractionOperator to a SparseOperator."""
if isinstance(operator, InteractionOperator):
return get_sparse_interaction_operator(operator)
elif isinstance(operator, FermionOperator):
return jordan_wigner_sparse(operator)
elif isinstance(operator, QubitOperator):
if n_qubits is None:
n_qubits = count_qubits(operator)
return qubit_operator_sparse(operator, n_qubits)
def benchmark_jordan_wigner_sparse(n_qubits):
"""Benchmark the speed at which a FermionOperator is mapped to a matrix.
Args:
n_qubits: The number of qubits in the example.
Returns:
runtime: The time in seconds that the benchmark took.
"""
# Initialize a random FermionOperator.
molecular_operator = artificial_molecular_operator(n_qubits)
fermion_operator = get_fermion_operator(molecular_operator)
# Map to SparseOperator class.
start_time = time.time()
sparse_operator = jordan_wigner_sparse(fermion_operator)
runtime = time.time() - start_time
return runtime
def get_sparse_interaction_operator(interaction_operator):
fermion_operator = get_fermion_operator(interaction_operator)
sparse_operator = jordan_wigner_sparse(fermion_operator)
return sparse_operator