def _create_eigs(matrix, num_ancillae, negative_evals):
# Adding an additional flag qubit for negative eigenvalues
ne_qfts = [None, None]
if negative_evals:
num_ancillae += 1
ne_qfts = [StandardQFTS(num_ancillae - 1), StandardIQFTS(num_ancillae - 1)]
return EigsQPE(MatrixOperator(matrix=matrix),
StandardIQFTS(num_ancillae),
num_time_slices=1,
num_ancillae=num_ancillae,
expansion_mode='suzuki',
expansion_order=2,
evo_time=None,
negative_evals=negative_evals,
ne_qfts=ne_qfts)
def create_eigs(matrix, num_ancillae, negative_evals):
ne_qfts = [None, None]
if negative_evals:
num_ancillae += 1
ne_qfts = [
StandardQFTS(num_ancillae - 1),
StandardIQFTS(num_ancillae - 1)
]
return EigsQPE(MatrixOperator(matrix=matrix),
StandardIQFTS(num_ancillae),
num_time_slices=50,
num_ancillae=num_ancillae,
expansion_mode='suzuki',
expansion_order=2,
evo_time=None,
negative_evals=negative_evals,
ne_qfts=ne_qfts)
def _create_eigs(matrix,
num_ancillae,
negative_evals,
use_circuit_library=True):
# Adding an additional flag qubit for negative eigenvalues
ne_qfts = [None, None]
if not use_circuit_library:
warnings.filterwarnings('ignore', category=DeprecationWarning)
if negative_evals:
num_ancillae += 1
if use_circuit_library:
ne_qfts = [
QFT(num_ancillae - 1),
QFT(num_ancillae - 1).inverse()
]
else:
ne_qfts = [
StandardQFTS(num_ancillae - 1),
StandardIQFTS(num_ancillae - 1)
]
if use_circuit_library:
iqft = QFT(num_ancillae).inverse()
else:
iqft = StandardIQFTS(num_ancillae)
eigs_qpe = EigsQPE(MatrixOperator(matrix=matrix),
iqft,
num_time_slices=1,
num_ancillae=num_ancillae,
expansion_mode='suzuki',
expansion_order=2,
evo_time=None,
negative_evals=negative_evals,
ne_qfts=ne_qfts)
if not use_circuit_library:
warnings.filterwarnings('always', category=DeprecationWarning)
return eigs_qpe