def setUp(self):
super().setUp()
self.ops = {
'X': XGate(),
'Y': YGate(),
'Z': ZGate(),
'H': HGate(),
'S': SGate()
}
def from_label(cls, label):
"""Return a tensor product of single-qubit operators.
Args:
label (string): single-qubit operator string.
Returns:
Operator: The N-qubit operator.
Raises:
QiskitError: if the label contains invalid characters, or the
length of the label is larger than an explicitly
specified num_qubits.
Additional Information:
The labels correspond to the single-qubit matrices:
'I': [[1, 0], [0, 1]]
'X': [[0, 1], [1, 0]]
'Y': [[0, -1j], [1j, 0]]
'Z': [[1, 0], [0, -1]]
'H': [[1, 1], [1, -1]] / sqrt(2)
'S': [[1, 0], [0 , 1j]]
'T': [[1, 0], [0, (1+1j) / sqrt(2)]]
'0': [[1, 0], [0, 0]]
'1': [[0, 0], [0, 1]]
'+': [[0.5, 0.5], [0.5 , 0.5]]
'-': [[0.5, -0.5], [-0.5 , 0.5]]
'r': [[0.5, -0.5j], [0.5j , 0.5]]
'l': [[0.5, 0.5j], [-0.5j , 0.5]]
"""
# Check label is valid
label_mats = {
'I': IGate().to_matrix(),
'X': XGate().to_matrix(),
'Y': YGate().to_matrix(),
'Z': ZGate().to_matrix(),
'H': HGate().to_matrix(),
'S': SGate().to_matrix(),
'T': TGate().to_matrix(),
'0': np.array([[1, 0], [0, 0]], dtype=complex),
'1': np.array([[0, 0], [0, 1]], dtype=complex),
'+': np.array([[0.5, 0.5], [0.5, 0.5]], dtype=complex),
'-': np.array([[0.5, -0.5], [-0.5, 0.5]], dtype=complex),
'r': np.array([[0.5, -0.5j], [0.5j, 0.5]], dtype=complex),
'l': np.array([[0.5, 0.5j], [-0.5j, 0.5]], dtype=complex),
}
if re.match(r'^[IXYZHST01rl\-+]+$', label) is None:
raise QiskitError('Label contains invalid characters.')
# Initialize an identity matrix and apply each gate
num_qubits = len(label)
op = Operator(np.eye(2 ** num_qubits, dtype=complex))
for qubit, char in enumerate(reversed(label)):
if char != 'I':
op = op.compose(label_mats[char], qargs=[qubit])
return op
def from_label(label):
"""Return a tensor product of single-qubit Clifford gates.
Args:
label (string): single-qubit operator string.
Returns:
Clifford: The N-qubit Clifford operator.
Raises:
QiskitError: if the label contains invalid characters.
Additional Information:
The labels correspond to the single-qubit Cliffords are
* - Label
- Stabilizer
- Destabilizer
* - ``"I"``
- +Z
- +X
* - ``"X"``
- -Z
- +X
* - ``"Y"``
- -Z
- -X
* - ``"Z"``
- +Z
- -X
* - ``"H"``
- +X
- +Z
* - ``"S"``
- +Z
- +Y
"""
# Check label is valid
label_gates = {
'I': IGate(),
'X': XGate(),
'Y': YGate(),
'Z': ZGate(),
'H': HGate(),
'S': SGate()
}
if re.match(r'^[IXYZHS\-+]+$', label) is None:
raise QiskitError('Label contains invalid characters.')
# Initialize an identity matrix and apply each gate
num_qubits = len(label)
op = Clifford(np.eye(2 * num_qubits, dtype=np.bool))
for qubit, char in enumerate(reversed(label)):
_append_circuit(op, label_gates[char], qargs=[qubit])
return op
def test_control_implementation(self):
"""Run a test case for controlling the circuit, which should use ``Gate.control``."""
qc = QuantumCircuit(3)
qc.cx(0, 1)
qc.cry(0.2, 0, 1)
qc.t(0)
qc.append(SGate().control(2), [0, 1, 2])
qc.iswap(2, 0)
c_qc = qc.control(2, ctrl_state="10")
cgate = qc.to_gate().control(2, ctrl_state="10")
ref = QuantumCircuit(*c_qc.qregs)
ref.append(cgate, ref.qubits)
self.assertEqual(ref, c_qc)
def test_decompose_gate_type(self):
"""Test decompose specifying gate type."""
circuit = QuantumCircuit(1)
circuit.append(SGate(label="s_gate"), [0])
decomposed = circuit.decompose(gates_to_decompose=SGate)
self.assertNotIn("s", decomposed.count_ops())
def modify_subcircuit_instance(subcircuit, init, meas):
"""
Modify the different init, meas for a given subcircuit
Returns:
Modified subcircuit_instance
List of mutated measurements
"""
subcircuit_dag = circuit_to_dag(subcircuit)
subcircuit_instance_dag = copy.deepcopy(subcircuit_dag)
for i, x in enumerate(init):
q = subcircuit.qubits[i]
if x == "zero":
continue
elif x == "one":
subcircuit_instance_dag.apply_operation_front(
op=XGate(), qargs=[q], cargs=[]
)
elif x == "plus":
subcircuit_instance_dag.apply_operation_front(
op=HGate(), qargs=[q], cargs=[]
)
elif x == "minus":
subcircuit_instance_dag.apply_operation_front(
op=HGate(), qargs=[q], cargs=[]
)
subcircuit_instance_dag.apply_operation_front(
op=XGate(), qargs=[q], cargs=[]
)
elif x == "plusI":
subcircuit_instance_dag.apply_operation_front(
op=SGate(), qargs=[q], cargs=[]
)
subcircuit_instance_dag.apply_operation_front(
op=HGate(), qargs=[q], cargs=[]
)
elif x == "minusI":
subcircuit_instance_dag.apply_operation_front(
op=SGate(), qargs=[q], cargs=[]
)
subcircuit_instance_dag.apply_operation_front(
op=HGate(), qargs=[q], cargs=[]
)
subcircuit_instance_dag.apply_operation_front(
op=XGate(), qargs=[q], cargs=[]
)
else:
raise Exception("Illegal initialization :", x)
for i, x in enumerate(meas):
q = subcircuit.qubits[i]
if x == "I" or x == "comp":
continue
elif x == "X":
subcircuit_instance_dag.apply_operation_back(
op=HGate(), qargs=[q], cargs=[]
)
elif x == "Y":
subcircuit_instance_dag.apply_operation_back(
op=SdgGate(), qargs=[q], cargs=[]
)
subcircuit_instance_dag.apply_operation_back(
op=HGate(), qargs=[q], cargs=[]
)
else:
raise Exception("Illegal measurement basis:", x)
subcircuit_instance_circuit = dag_to_circuit(subcircuit_instance_dag)
return subcircuit_instance_circuit
def _standard_gate_instruction(instruction, ignore_phase=True):
"""Temporary function to create Instruction objects from a json string,
which is necessary for creating a new QuantumError object from deprecated
json-based input. Note that the type of returned object is different from
the deprecated standard_gate_instruction.
TODO: to be removed after deprecation period.
Args:
instruction (dict): A qobj instruction.
ignore_phase (bool): Ignore global phase on unitary matrix in
comparison to canonical unitary.
Returns:
list: a list of (instructions, qubits) equivalent to in input instruction.
"""
gate = {
"id": IGate(),
"x": XGate(),
"y": YGate(),
"z": ZGate(),
"h": HGate(),
"s": SGate(),
"sdg": SdgGate(),
"t": TGate(),
"tdg": TdgGate(),
"cx": CXGate(),
"cz": CZGate(),
"swap": SwapGate()
}
name = instruction.get("name", None)
qubits = instruction["qubits"]
if name in gate:
return [(gate[name], qubits)]
if name not in ["mat", "unitary", "kraus"]:
return [instruction]
params = instruction["params"]
with warnings.catch_warnings():
warnings.filterwarnings("ignore",
category=DeprecationWarning,
module="qiskit.providers.aer.noise.errors.errorutils")
# Check for single-qubit reset Kraus
if name == "kraus":
if len(qubits) == 1:
superop = SuperOp(Kraus(params))
# Check if reset to |0>
reset0 = reset_superop(1)
if superop == reset0:
return [(Reset(), [0])]
# Check if reset to |1>
reset1 = reset0.compose(Operator(standard_gate_unitary('x')))
if superop == reset1:
return [(Reset(), [0]), (XGate(), [0])]
return [instruction]
# Check single qubit gates
mat = params[0]
if len(qubits) == 1:
# Check clifford gates
for j in range(24):
if matrix_equal(
mat,
single_qubit_clifford_matrix(j),
ignore_phase=ignore_phase):
return [(gate, [0]) for gate in _CLIFFORD_GATES[j]]
# Check t gates
for name in ["t", "tdg"]:
if matrix_equal(
mat,
standard_gate_unitary(name),
ignore_phase=ignore_phase):
return [(gate[name], qubits)]
# TODO: u1,u2,u3 decomposition
# Check two qubit gates
if len(qubits) == 2:
for name in ["cx", "cz", "swap"]:
if matrix_equal(
mat,
standard_gate_unitary(name),
ignore_phase=ignore_phase):
return [(gate[name], qubits)]
# Check reversed CX
if matrix_equal(
mat,
standard_gate_unitary("cx_10"),
ignore_phase=ignore_phase):
return [(CXGate(), [qubits[1], qubits[0]])]
# Check 2-qubit Pauli's
paulis = ["id", "x", "y", "z"]
for pauli0 in paulis:
for pauli1 in paulis:
pmat = np.kron(
standard_gate_unitary(pauli1),
standard_gate_unitary(pauli0))
if matrix_equal(mat, pmat, ignore_phase=ignore_phase):
if pauli0 == "id":
return [(gate[pauli1], [qubits[1]])]
elif pauli1 == "id":
return [(gate[pauli0], [qubits[0]])]
else:
return [(gate[pauli0], [qubits[0]]), (gate[pauli1], [qubits[1]])]
# Check three qubit toffoli
if len(qubits) == 3:
if matrix_equal(
mat,
standard_gate_unitary("ccx_012"),
ignore_phase=ignore_phase):
return [(CCXGate(), qubits)]
if matrix_equal(
mat,
standard_gate_unitary("ccx_021"),
ignore_phase=ignore_phase):
return [(CCXGate(), [qubits[0], qubits[2], qubits[1]])]
if matrix_equal(
mat,
standard_gate_unitary("ccx_120"),
ignore_phase=ignore_phase):
return [(CCXGate(), [qubits[1], qubits[2], qubits[0]])]
# Else return input in
return [instruction]
('s', 'h', 'z'),
('sdg', 'h', 'z'),
('z', 'h', 'z'),
# u3 gates
(
'x', ),
('y', ),
('s', 'x'),
('sdg', 'x')
]
return labels[j]
_CLIFFORD_GATES = [
(IGate(), ),
(SGate(), ),
(SdgGate(), ),
(ZGate(), ),
# u2 gates
(HGate(), ),
(HGate(), ZGate()),
(ZGate(), HGate()),
(HGate(), SGate()),
(SGate(), HGate()),
(HGate(), SdgGate()),
(SdgGate(), HGate()),
(SGate(), HGate(), SGate()),
(SdgGate(), HGate(), SGate()),
(ZGate(), HGate(), SGate()),
(SGate(), HGate(), SdgGate()),
(SdgGate(), HGate(), SdgGate()),
def get_one_subcircuit_instances(subcircuit, combinations):
'''
Modify the different init, meas for a given subcircuit
Returns:
subcircuit_instances[subcircuit_instance_idx] = circuit, init, meas, shots
subcircuit_instances_idx[init,meas] = subcircuit_instance_idx
'''
subcircuit_instances = {}
subcircuit_instances_idx = {}
for combination_ctr, combination in enumerate(combinations):
# print('combination %d/%d :'%(combination_ctr+1,len(combinations)),combination)
subcircuit_dag = circuit_to_dag(subcircuit)
inits, meas = combination
for i, x in enumerate(inits):
q = subcircuit.qubits[i]
if x == 'zero':
continue
elif x == 'one':
subcircuit_dag.apply_operation_front(op=XGate(),
qargs=[q],
cargs=[])
elif x == 'plus':
subcircuit_dag.apply_operation_front(op=HGate(),
qargs=[q],
cargs=[])
elif x == 'minus':
subcircuit_dag.apply_operation_front(op=HGate(),
qargs=[q],
cargs=[])
subcircuit_dag.apply_operation_front(op=XGate(),
qargs=[q],
cargs=[])
elif x == 'plusI':
subcircuit_dag.apply_operation_front(op=SGate(),
qargs=[q],
cargs=[])
subcircuit_dag.apply_operation_front(op=HGate(),
qargs=[q],
cargs=[])
elif x == 'minusI':
subcircuit_dag.apply_operation_front(op=SGate(),
qargs=[q],
cargs=[])
subcircuit_dag.apply_operation_front(op=HGate(),
qargs=[q],
cargs=[])
subcircuit_dag.apply_operation_front(op=XGate(),
qargs=[q],
cargs=[])
else:
raise Exception('Illegal initialization : ', x)
for i, x in enumerate(meas):
q = subcircuit.qubits[i]
if x == 'I' or x == 'comp':
continue
elif x == 'X':
subcircuit_dag.apply_operation_back(op=HGate(),
qargs=[q],
cargs=[])
elif x == 'Y':
subcircuit_dag.apply_operation_back(op=SdgGate(),
qargs=[q],
cargs=[])
subcircuit_dag.apply_operation_back(op=HGate(),
qargs=[q],
cargs=[])
else:
raise Exception('Illegal measurement basis:', x)
subcircuit_inst = dag_to_circuit(subcircuit_dag)
num_shots = max(8192, int(2**subcircuit_inst.num_qubits))
num_shots = min(8192 * 10, num_shots)
mutated_meas = mutate_measurement_basis(meas)
for idx, meas in enumerate(mutated_meas):
subcircuit_instance_idx = len(subcircuit_instances)
if idx == 0:
parent_subcircuit_instance_idx = subcircuit_instance_idx
shots = num_shots
else:
shots = 0
subcircuit_instances[subcircuit_instance_idx] = {
'circuit': subcircuit_inst,
'init': tuple(inits),
'meas': tuple(meas),
'shots': shots,
'parent': parent_subcircuit_instance_idx
}
subcircuit_instances_idx[(tuple(inits),
tuple(meas))] = subcircuit_instance_idx
return subcircuit_instances, subcircuit_instances_idx
def get_subcircuit_instance(subcircuit_idx, subcircuit, combinations):
circ_dict = {}
for combination_ctr, combination in enumerate(combinations):
# print('combination %d/%d :'%(combination_ctr,len(combinations)),combination)
subcircuit_dag = circuit_to_dag(subcircuit)
inits, meas = combination
for i, x in enumerate(inits):
q = subcircuit.qubits[i]
if x == 'zero':
continue
elif x == 'one':
subcircuit_dag.apply_operation_front(op=XGate(),
qargs=[q],
cargs=[])
elif x == 'plus':
subcircuit_dag.apply_operation_front(op=HGate(),
qargs=[q],
cargs=[])
elif x == 'minus':
subcircuit_dag.apply_operation_front(op=HGate(),
qargs=[q],
cargs=[])
subcircuit_dag.apply_operation_front(op=XGate(),
qargs=[q],
cargs=[])
elif x == 'plusI':
subcircuit_dag.apply_operation_front(op=SGate(),
qargs=[q],
cargs=[])
subcircuit_dag.apply_operation_front(op=HGate(),
qargs=[q],
cargs=[])
elif x == 'minusI':
subcircuit_dag.apply_operation_front(op=SGate(),
qargs=[q],
cargs=[])
subcircuit_dag.apply_operation_front(op=HGate(),
qargs=[q],
cargs=[])
subcircuit_dag.apply_operation_front(op=XGate(),
qargs=[q],
cargs=[])
else:
raise Exception('Illegal initialization : ', x)
for i, x in enumerate(meas):
q = subcircuit.qubits[i]
if x == 'I' or x == 'comp':
continue
elif x == 'X':
subcircuit_dag.apply_operation_back(op=HGate(),
qargs=[q],
cargs=[])
elif x == 'Y':
subcircuit_dag.apply_operation_back(op=SdgGate(),
qargs=[q],
cargs=[])
subcircuit_dag.apply_operation_back(op=HGate(),
qargs=[q],
cargs=[])
else:
raise Exception('Illegal measurement basis:', x)
subcircuit_inst = dag_to_circuit(subcircuit_dag)
# NOTE: Adjust subcircuit shots here
num_shots = max(8192, int(2**subcircuit_inst.num_qubits))
num_shots = min(8192 * 10, num_shots)
circ_dict[(subcircuit_idx, tuple(inits), tuple(meas))] = {
'circuit': subcircuit_inst,
'shots': num_shots
}
return circ_dict