def test_ops_types(self):
"""Test adding noises only to delays in a scheduled circuit."""
t1s = [0.10, 0.11]
t2s = [0.20, 0.21]
dt = 0.01
qc = QuantumCircuit(2, 2)
qc.h(0)
qc.cx(0, 1)
qc.measure([0, 1], [0, 1])
durations = [("h", None, 10), ("cx", None, 50), ("measure", None, 200)]
sched_circ = transpile(qc,
scheduling_method='alap',
instruction_durations=durations)
noise_pass = RelaxationNoisePass(t1s=t1s,
t2s=t2s,
dt=dt,
op_types=Delay)
noisy_circ = noise_pass(sched_circ)
expected = QuantumCircuit(2, 2)
expected.h(0)
expected.delay(10, 1)
expected.append(
thermal_relaxation_error(t1s[1], t2s[1], 10 * dt).to_instruction(),
[1])
expected.cx(0, 1)
expected.measure([0, 1], [0, 1])
self.assertEqual(expected, noisy_circ)
def test_default_with_non_scheduled_circuit(self):
"""Test never adding noises to non-scheduled circuit."""
qc = QuantumCircuit(2, 2)
qc.h(0)
qc.cx(0, 1)
qc.measure([0, 1], [0, 1])
noise_pass = RelaxationNoisePass(t1s=[0.10, 0.11],
t2s=[0.20, 0.21],
dt=0.01)
with self.assertWarns(UserWarning):
noisy_circ = noise_pass(qc)
self.assertEqual(qc, noisy_circ)
def test_delay_circuit_on_single_qubit(self):
t1s = [0.10, 0.11]
t2s = [0.20, 0.21]
dt = 0.01
duration = 100
qc = QuantumCircuit(1)
qc.delay(duration, 0)
relax_pass = RelaxationNoisePass(t1s=t1s, t2s=t2s, dt=dt)
actual = qi.SuperOp(relax_pass(qc))
expected = qi.SuperOp(
thermal_relaxation_error(t1s[0], t2s[0], duration * dt))
self.assertEqual(expected, actual)
def test_delay_units(self, duration, unit):
"""Test un-scheduled delay with different units."""
t1 = 0.004
t2 = 0.008
dt = 1e-10 # 0.1 ns
target_duration = 1e-5
qc = QuantumCircuit(1)
qc.delay(duration, 0, unit=unit)
relax_pass = RelaxationNoisePass(t1s=[t1], t2s=[t2], dt=dt)
actual = qi.SuperOp(relax_pass(qc))
expected = qi.SuperOp(thermal_relaxation_error(t1, t2,
target_duration))
self.assertEqual(expected, actual)
def test_delay_circuit_on_multi_qubits(self):
t1s = [0.10, 0.11]
t2s = [0.20, 0.21]
dt = 0.01
duration = 100
qc = QuantumCircuit(2)
qc.delay(duration, 0)
qc.delay(duration, 1)
relax_pass = RelaxationNoisePass(t1s=t1s, t2s=t2s, dt=dt)
actual = qi.SuperOp(relax_pass(qc))
noise0 = thermal_relaxation_error(t1s[0], t2s[0], duration * dt)
noise1 = thermal_relaxation_error(t1s[1], t2s[1], duration * dt)
expected = qi.SuperOp(noise0.expand(noise1))
self.assertEqual(expected, actual)
def test_default_with_scheduled_circuit(self):
"""Test adding noises to all ops in a scheduled circuit."""
qc = QuantumCircuit(2, 2)
qc.h(0)
qc.cx(0, 1)
qc.measure([0, 1], [0, 1])
durations = [("h", None, 10), ("cx", None, 50), ("measure", None, 200)]
sched_circ = transpile(qc,
scheduling_method='alap',
instruction_durations=durations)
noise_pass = RelaxationNoisePass(t1s=[0.10, 0.11],
t2s=[0.20, 0.21],
dt=0.01)
noisy_circ = noise_pass(sched_circ)
self.assertEqual(
6,
noisy_circ.decompose().decompose().count_ops()["kraus"])
def test_raise_if_supplied_invalid_ops(self):
with self.assertRaises(TranspilerError):
RelaxationNoisePass(t1s=[1], t2s=[1], dt=1,
op_types="delay") # str is invalid