def TestNoise(self):
"""
Test for Processor with noise
"""
# setup and fidelity without noise
init_state = qubit_states(2, [0, 0, 0, 0])
tlist = np.array([0., np.pi/2.])
a = destroy(2)
proc = Processor(N=2)
proc.add_control(sigmax(), targets=1)
proc.pulses[0].tlist = tlist
proc.pulses[0].coeff = np.array([1])
result = proc.run_state(init_state=init_state)
assert_allclose(
fidelity(result.states[-1], qubit_states(2, [0, 1, 0, 0])),
1, rtol=1.e-7)
# decoherence noise
dec_noise = DecoherenceNoise([0.25*a], targets=1)
proc.add_noise(dec_noise)
result = proc.run_state(init_state=init_state)
assert_allclose(
fidelity(result.states[-1], qubit_states(2, [0, 1, 0, 0])),
0.981852, rtol=1.e-3)
# white random noise
proc.noise = []
white_noise = RandomNoise(0.2, np.random.normal, loc=0.1, scale=0.1)
proc.add_noise(white_noise)
result = proc.run_state(init_state=init_state)
def TestGetObjevo(self):
tlist = np.array([1, 2, 3, 4, 5, 6], dtype=float)
coeffs = np.array([[1, 1, 1, 1, 1, 1]], dtype=float)
processor = Processor(N=1)
processor.add_ctrl(sigmaz())
processor.tlist = tlist
processor.coeffs = coeffs
# without noise
unitary_qobjevo = processor.get_unitary_qobjevo(args={"test": True})
assert_allclose(unitary_qobjevo.ops[0].qobj, sigmaz())
assert_allclose(unitary_qobjevo.tlist, tlist)
assert_allclose(unitary_qobjevo.ops[0].coeff, coeffs[0])
assert_(unitary_qobjevo.args["test"],
msg="Arguments not correctly passed on")
# with decoherence noise
dec_noise = DecoherenceNoise(c_ops=sigmax(),
coeffs=coeffs,
tlist=tlist)
processor.add_noise(dec_noise)
assert_equal(unitary_qobjevo.to_list(),
processor.get_unitary_qobjevo().to_list())
noisy_qobjevo, c_ops = processor.get_noisy_qobjevo(args={"test": True})
assert_(noisy_qobjevo.args["_step_func_coeff"],
msg="Spline type not correctly passed on")
assert_(noisy_qobjevo.args["test"],
msg="Arguments not correctly passed on")
assert_(sigmaz() in [pair[0] for pair in noisy_qobjevo.to_list()])
assert_equal(c_ops[0].ops[0].qobj, sigmax())
assert_equal(c_ops[0].tlist, tlist)
# with amplitude noise
processor.spline_kind = "cubic"
new_tlist = np.linspace(1, 6, int(5 / 0.2))
new_coeffs = np.random.rand(1, len(new_tlist))
# noise with a different operator
amp_noise = ControlAmpNoise(ops=sigmax(), coeffs=coeffs, tlist=tlist)
processor.add_noise(amp_noise)
noisy_qobjevo, c_ops = processor.get_noisy_qobjevo(args={"test": True})
assert_(not noisy_qobjevo.args["_step_func_coeff"],
msg="Spline type not correctly passed on")
assert_(sigmax() in [pair[0] for pair in noisy_qobjevo.to_list()])
# noise with operators in the processor
# Since the noise operator is also sigmaz,
# it should be merged with the original operator
amp_noise2 = ControlAmpNoise(coeffs=coeffs, tlist=tlist)
processor.noise[1] = amp_noise2
noisy_qobjevo, c_ops = processor.get_noisy_qobjevo(args={"test": True})
assert_(not noisy_qobjevo.args["_step_func_coeff"],
msg="Spline type not correctly passed on")
assert_equal(len(noisy_qobjevo.ops), 1)
assert_equal(sigmaz(), noisy_qobjevo.ops[0].qobj)
assert_equal(coeffs[0] * 2, noisy_qobjevo.ops[0].coeff)
def TestUserNoise(self):
"""
Test for the user-defined noise object
"""
dr_noise = DriftNoise(sigmax())
proc = Processor(1)
proc.add_noise(dr_noise)
proc.tlist = np.array([0, np.pi / 2.])
result = proc.run_state(rho0=basis(2, 0))
assert_allclose(fidelity(result.states[-1], basis(2, 1)),
1,
rtol=1.0e-6)
def TestGetObjevo(self):
tlist = np.array([1, 2, 3, 4, 5, 6], dtype=float)
coeff = np.array([1, 1, 1, 1, 1, 1], dtype=float)
processor = Processor(N=1)
processor.add_control(sigmaz())
processor.pulses[0].tlist = tlist
processor.pulses[0].coeff = coeff
# without noise
unitary_qobjevo, _ = processor.get_qobjevo(
args={"test": True}, noisy=False)
assert_allclose(unitary_qobjevo.ops[0].qobj, sigmaz())
assert_allclose(unitary_qobjevo.tlist, tlist)
assert_allclose(unitary_qobjevo.ops[0].coeff, coeff[0])
assert_(unitary_qobjevo.args["test"],
msg="Arguments not correctly passed on")
# with decoherence noise
dec_noise = DecoherenceNoise(
c_ops=sigmax(), coeff=coeff, tlist=tlist)
processor.add_noise(dec_noise)
assert_equal(unitary_qobjevo.to_list(),
processor.get_qobjevo(noisy=False)[0].to_list())
noisy_qobjevo, c_ops = processor.get_qobjevo(
args={"test": True}, noisy=True)
assert_(noisy_qobjevo.args["_step_func_coeff"],
msg="Spline type not correctly passed on")
assert_(noisy_qobjevo.args["test"],
msg="Arguments not correctly passed on")
assert_(sigmaz() in [pair[0] for pair in noisy_qobjevo.to_list()])
assert_equal(c_ops[0].ops[0].qobj, sigmax())
assert_equal(c_ops[0].tlist, tlist)
# with amplitude noise
processor = Processor(N=1, spline_kind="cubic")
processor.add_control(sigmaz())
tlist = np.linspace(1, 6, int(5/0.2))
coeff = np.random.rand(len(tlist))
processor.pulses[0].tlist = tlist
processor.pulses[0].coeff = coeff
amp_noise = ControlAmpNoise(coeff=coeff, tlist=tlist)
processor.add_noise(amp_noise)
noisy_qobjevo, c_ops = processor.get_qobjevo(
args={"test": True}, noisy=True)
assert_(not noisy_qobjevo.args["_step_func_coeff"],
msg="Spline type not correctly passed on")
assert_(noisy_qobjevo.args["test"],
msg="Arguments not correctly passed on")
assert_equal(len(noisy_qobjevo.ops), 2)
assert_equal(sigmaz(), noisy_qobjevo.ops[0].qobj)
assert_allclose(coeff, noisy_qobjevo.ops[0].coeff, rtol=1.e-10)
def test_user_defined_noise(self):
"""
Test for the user-defined noise object
"""
dr_noise = DriftNoise(sigmax())
proc = Processor(1)
proc.add_noise(dr_noise)
tlist = np.array([0, np.pi / 2.])
proc.add_pulse(Pulse(identity(2), 0, tlist, False))
result = proc.run_state(init_state=basis(2, 0))
assert_allclose(fidelity(result.states[-1], basis(2, 1)),
1,
rtol=1.0e-6)
def TestSpline(self):
"""
Test if the spline kind is correctly transfered into
the arguments in QobjEvo
"""
tlist = np.array([1, 2, 3, 4, 5, 6], dtype=float)
coeff = np.array([1, 1, 1, 1, 1, 1], dtype=float)
processor = Processor(N=1, spline_kind="step_func")
processor.add_control(sigmaz())
processor.pulses[0].tlist = tlist
processor.pulses[0].coeff = coeff
ideal_qobjevo, _ = processor.get_qobjevo(noisy=False)
assert_(ideal_qobjevo.args["_step_func_coeff"])
noisy_qobjevo, c_ops = processor.get_qobjevo(noisy=True)
assert_(noisy_qobjevo.args["_step_func_coeff"])
processor.T1 = 100.
processor.add_noise(ControlAmpNoise(coeff=coeff, tlist=tlist))
noisy_qobjevo, c_ops = processor.get_qobjevo(noisy=True)
assert_(noisy_qobjevo.args["_step_func_coeff"])
tlist = np.array([1, 2, 3, 4, 5, 6], dtype=float)
coeff = np.array([1, 1, 1, 1, 1, 1], dtype=float)
processor = Processor(N=1, spline_kind="cubic")
processor.add_control(sigmaz())
processor.pulses[0].tlist = tlist
processor.pulses[0].coeff = coeff
ideal_qobjevo, _ = processor.get_qobjevo(noisy=False)
assert_(not ideal_qobjevo.args["_step_func_coeff"])
noisy_qobjevo, c_ops = processor.get_qobjevo(noisy=True)
assert_(not noisy_qobjevo.args["_step_func_coeff"])
processor.T1 = 100.
processor.add_noise(ControlAmpNoise(coeff=coeff, tlist=tlist))
noisy_qobjevo, c_ops = processor.get_qobjevo(noisy=True)
assert_(not noisy_qobjevo.args["_step_func_coeff"])
def TestNoise(self):
"""
Test for Processor with noise
"""
# setup and fidelity without noise
rho0 = qubit_states(2, [0, 0, 0, 0])
tlist = np.array([0., np.pi / 2.])
a = destroy(2)
proc = Processor(N=2)
proc.tlist = tlist
proc.coeffs = np.array([1]).reshape((1, 1))
proc.add_ctrl(sigmax(), targets=1)
result = proc.run_state(rho0=rho0)
assert_allclose(fidelity(result.states[-1],
qubit_states(2, [0, 1, 0, 0])),
1,
rtol=1.e-7)
# decoherence noise
dec_noise = DecoherenceNoise([0.25 * a], targets=1)
proc.add_noise(dec_noise)
result = proc.run_state(rho0=rho0)
assert_allclose(fidelity(result.states[-1],
qubit_states(2, [0, 1, 0, 0])),
0.981852,
rtol=1.e-3)
# white noise with internal/external operators
proc.noise = []
white_noise = RandomNoise(loc=0.1, scale=0.1)
proc.add_noise(white_noise)
result = proc.run_state(rho0=rho0)
proc.noise = []
white_noise = RandomNoise(loc=0.1, scale=0.1, ops=sigmax(), targets=1)
proc.add_noise(white_noise)
result = proc.run_state(rho0=rho0)