def _measurement_circuit():
qc = QubitCircuit(2, num_cbits=2)
qc.add_measurement("M0", targets=[0], classical_store=0)
qc.add_measurement("M1", targets=[1], classical_store=1)
return qc
def test_reverse(self):
"""
Reverse a quantum circuit
"""
qc = QubitCircuit(3)
qc.add_gate("RX", targets=[0], arg_value=3.141,
arg_label=r"\pi/2")
qc.add_gate("CNOT", targets=[1], controls=[0])
qc.add_measurement("M1", targets=[1])
qc.add_gate("SNOT", targets=[2])
# Keep input output same
qc.add_state("0", targets=[0])
qc.add_state("+", targets=[1], state_type="output")
qc.add_state("-", targets=[1])
qc_rev = qc.reverse_circuit()
assert qc_rev.gates[0].name == "SNOT"
assert qc_rev.gates[1].name == "M1"
assert qc_rev.gates[2].name == "CNOT"
assert qc_rev.gates[3].name == "RX"
assert qc_rev.input_states[0] == "0"
assert qc_rev.input_states[2] is None
assert qc_rev.output_states[1] == "+"
def test_qasm_str():
expected_qasm_str = ('// QASM 2.0 file generated by QuTiP\n\nOPENQASM 2.0;'
'\ninclude "qelib1.inc";\n\nqreg q[2];\ncreg c[1];\n\n'
'x q[0];\nmeasure q[1] -> c[0]\n')
simple_qc = QubitCircuit(2, num_cbits=1)
simple_qc.add_gate("X", targets=[0])
simple_qc.add_measurement("M", targets=[1], classical_store=0)
assert circuit_to_qasm_str(simple_qc) == expected_qasm_str
def test_add_circuit(self):
"""
Addition of a circuit to a `QubitCircuit`
"""
qc = QubitCircuit(6)
qc.add_gate("CNOT", targets=[1], controls=[0])
test_gate = Gate("SWAP", targets=[1, 4])
qc.add_gate(test_gate)
qc.add_gate("TOFFOLI", controls=[0, 1], targets=[2])
qc.add_gate("SNOT", targets=[3])
qc.add_gate(test_gate, index=[3])
qc.add_measurement("M0", targets=[0], classical_store=[1])
qc.add_1q_gate("RY", start=4, end=5, arg_value=1.570796)
qc1 = QubitCircuit(6)
qc1.add_circuit(qc)
# Test if all gates and measurements are added
assert len(qc1.gates) == len(qc.gates)
for i in range(len(qc1.gates)):
assert (qc1.gates[i].name == qc.gates[i].name)
assert (qc1.gates[i].targets == qc.gates[i].targets)
if (isinstance(qc1.gates[i], Gate)
and isinstance(qc.gates[i], Gate)):
assert (qc1.gates[i].controls == qc.gates[i].controls)
assert (qc1.gates[i].classical_controls ==
qc.gates[i].classical_controls)
elif (isinstance(qc1.gates[i], Measurement)
and isinstance(qc.gates[i], Measurement)):
assert (qc1.gates[i].classical_store ==
qc.gates[i].classical_store)
# Test exception when qubit out of range
pytest.raises(NotImplementedError, qc1.add_circuit, qc, start=4)
qc2 = QubitCircuit(8)
qc2.add_circuit(qc, start=2)
# Test if all gates are added
assert len(qc2.gates) == len(qc.gates)
# Test if the positions are correct
for i in range(len(qc2.gates)):
if qc.gates[i].targets is not None:
assert (qc2.gates[i].targets[0] == qc.gates[i].targets[0] + 2)
if (isinstance(qc.gates[i], Gate)
and qc.gates[i].controls is not None):
assert (qc2.gates[i].controls[0] == qc.gates[i].controls[0] +
2)
def _teleportation_circuit():
teleportation = QubitCircuit(3, num_cbits=2,
input_states=["q0", "0", "0", "c0", "c1"])
teleportation.add_gate("SNOT", targets=[1])
teleportation.add_gate("CNOT", targets=[2], controls=[1])
teleportation.add_gate("CNOT", targets=[1], controls=[0])
teleportation.add_gate("SNOT", targets=[0])
teleportation.add_measurement("M0", targets=[0], classical_store=1)
teleportation.add_measurement("M1", targets=[1], classical_store=0)
teleportation.add_gate("X", targets=[2], classical_controls=[0])
teleportation.add_gate("Z", targets=[2], classical_controls=[1])
return teleportation
def test_add_measurement(self):
"""
Addition of Measurement Object to a circuit.
"""
qc = QubitCircuit(3, num_cbits=2)
qc.add_measurement("M0", targets=[0], classical_store=1)
qc.add_gate("CNOT", targets=[1], controls=[0])
qc.add_gate("TOFFOLI", controls=[0, 1], targets=[2])
qc.add_measurement("M1", targets=[2], classical_store=0)
qc.add_gate("SNOT", targets=[1], classical_controls=[0, 1])
qc.add_measurement("M2", targets=[1])
# checking correct addition of measurements
assert qc.gates[0].targets[0] == 0
assert qc.gates[0].classical_store == 1
assert qc.gates[3].name == "M1"
assert qc.gates[5].classical_store is None
# checking if gates are added correctly with measurements
assert qc.gates[2].name == "TOFFOLI"
assert qc.gates[4].classical_controls == [0, 1]
def test_latex_code_non_reversed(self):
qc = QubitCircuit(1, num_cbits=1, reverse_states=False)
qc.add_measurement("M0", targets=0, classical_store=0)
exp = ' & & \\meter & \\qw \\\\ \n & ' + \
'& \\qw \\cwx[-1] & \\qw \\\\ \n'
assert qc.latex_code() == self._latex_template % exp
def test_add_circuit(self):
"""
Addition of a circuit to a `QubitCircuit`
"""
def customer_gate1(arg_values):
mat = np.zeros((4, 4), dtype=np.complex128)
mat[0, 0] = mat[1, 1] = 1.
mat[2:4, 2:4] = gates.rx(arg_values)
return Qobj(mat, dims=[[2, 2], [2, 2]])
qc = QubitCircuit(6)
qc.user_gates = {"CTRLRX": customer_gate1}
qc = QubitCircuit(6)
qc.add_gate("CNOT", targets=[1], controls=[0])
test_gate = Gate("SWAP", targets=[1, 4])
qc.add_gate(test_gate)
qc.add_gate("TOFFOLI", controls=[0, 1], targets=[2])
qc.add_gate("SNOT", targets=[3])
qc.add_gate(test_gate, index=[3])
qc.add_measurement("M0", targets=[0], classical_store=[1])
qc.add_1q_gate("RY", start=4, end=5, arg_value=1.570796)
qc.add_gate("CTRLRX", targets=[1, 2], arg_value=np.pi/2)
qc1 = QubitCircuit(6)
qc1.add_circuit(qc)
# Test if all gates and measurements are added
assert len(qc1.gates) == len(qc.gates)
# Test if the definitions of user gates are added
assert qc1.user_gates == qc.user_gates
for i in range(len(qc1.gates)):
assert (qc1.gates[i].name
== qc.gates[i].name)
assert (qc1.gates[i].targets
== qc.gates[i].targets)
if (isinstance(qc1.gates[i], Gate) and
isinstance(qc.gates[i], Gate)):
assert (qc1.gates[i].controls
== qc.gates[i].controls)
assert (qc1.gates[i].classical_controls
== qc.gates[i].classical_controls)
elif (isinstance(qc1.gates[i], Measurement) and
isinstance(qc.gates[i], Measurement)):
assert (qc1.gates[i].classical_store
== qc.gates[i].classical_store)
# Test exception when qubit out of range
pytest.raises(NotImplementedError, qc1.add_circuit, qc, start=4)
qc2 = QubitCircuit(8)
qc2.add_circuit(qc, start=2)
# Test if all gates are added
assert len(qc2.gates) == len(qc.gates)
# Test if the positions are correct
for i in range(len(qc2.gates)):
if qc.gates[i].targets is not None:
assert (qc2.gates[i].targets[0]
== qc.gates[i].targets[0]+2)
if (isinstance(qc.gates[i], Gate) and
qc.gates[i].controls is not None):
assert (qc2.gates[i].controls[0]
== qc.gates[i].controls[0]+2)
# Test exception when the operators to be added are not gates or measurements
qc.gates[-1] = 0
pytest.raises(TypeError, qc2.add_circuit, qc)
