def test_apply_random(self):
sampler = circuit.uniform_sampler(42)
m = circuit.Measurement("A", 0, sampler=sampler)
with patch('numpy.random.RandomState') as rsclass:
rs = MagicMock()
rsclass.return_value = rs
rs.random_sample = MagicMock()
p = rs.random_sample
p.return_value = 0.3
sdm = MagicMock()
sdm.peak_measurement = MagicMock(return_value=(0.06, 0.04))
sdm.project_measurement = MagicMock()
m.apply_to(sdm)
sdm.project_measurement.assert_called_once_with("A", 0)
sdm.peak_measurement = MagicMock(return_value=(0.06, 0.04))
sdm.project_measurement = MagicMock()
p.return_value = 0.7
m.apply_to(sdm)
sdm.project_measurement.assert_called_once_with("A", 1)
def test_uniform_sampler(self):
with patch("numpy.random.RandomState") as rsclass:
rs = MagicMock()
rsclass.return_value = rs
rs.random_sample = MagicMock(return_value=0.5)
s = circuit.uniform_sampler(seed=42)
next(s)
rsclass.assert_called_once_with(seed=42)
for p0 in np.linspace(0, 1, 10):
proj, dec, prob = s.send((p0, 1 - p0))
assert proj == dec
assert prob == 1
assert proj == int(p0 < 0.5)
def test_one_sampler_two_measurements(self):
# Biased sampler
s = circuit.BiasedSampler(alpha=1, readout_error=0.7)
m1 = circuit.Measurement("A", 0, sampler=s, output_bit="O")
m2 = circuit.Measurement("A", 0, sampler=s, output_bit="O")
# uniform sampler
s = circuit.uniform_sampler(seed=42)
m1 = circuit.Measurement("A", 0, sampler=s, output_bit="O")
m2 = circuit.Measurement("A", 0, sampler=s, output_bit="O")
# selection sampler
s = circuit.selection_sampler(result=1)
m1 = circuit.Measurement("A", 0, sampler=s, output_bit="O")
m2 = circuit.Measurement("A", 0, sampler=s, output_bit="O")
m1, m2
def get_qubit(noise_flag=True,
t1=np.inf,
t2=100000,
dephasing_axis=1e-5,
dephasing_angle=1e-5,
dephasing=1e-5,
p_exc_init=0,
p_dec_init=0,
p_exc_fin=0,
p_dec_fin=0,
dephase_var=1e-2 / (2 * pi),
msmt_time=3000,
interval_time=1000,
oneq_gate_time=100,
CZ_gate_time=40,
reset_time=100,
sampler=None,
seed=None,
readout_error=0.02,
static_flux_std=None,
**kwargs):
'''
The dictionary for parameters of the DiCarlo qubits, with standard
parameters pre-set.
This is a bit messy right now, but has the advantage of telling
the user which parameters they can set. Not sure how to improve
over this.
'''
if sampler is None:
if noise_flag is True:
sampler = uniform_noisy_sampler(seed=seed,
readout_error=readout_error)
else:
sampler = uniform_sampler(seed=seed)
if static_flux_std is not None:
quasistatic_flux = static_flux_std * np.random.randn()
else:
quasistatic_flux = None
if noise_flag is True:
param_dic = {
't1': t1,
't2': t2,
'dephasing_axis': dephasing_axis,
'dephasing': dephasing,
'dephasing_angle': dephasing_angle,
'dephase_var': dephase_var,
'p_exc_init': p_exc_init,
'p_dec_init': p_dec_init,
'p_exc_fin': p_exc_fin,
'p_dec_fin': p_dec_fin,
'msmt_time': msmt_time,
'interval_time': interval_time,
'oneq_gate_time': oneq_gate_time,
'CZ_gate_time': CZ_gate_time,
'ISwap_gate_time': CZ_gate_time * np.sqrt(2),
'reset_time': reset_time,
'photons': photons,
'alpha0': alpha0,
'kappa': kappa,
'chi': chi,
'quasistatic_flux': quasistatic_flux,
'high_frequency': high_frequency,
'sampler': sampler
}
else:
param_dic = {
't1': np.inf,
't2': np.inf,
'dephasing_axis': 0,
'dephasing': 0,
'dephasing_angle': 0,
'dephase_var': 0,
'p_exc_init': 0,
'p_dec_init': 0,
'p_exc_fin': 0,
'p_dec_fin': 0,
'msmt_time': msmt_time,
'interval_time': interval_time,
'CZ_gate_time': CZ_gate_time,
'ISwap_gate_time': CZ_gate_time * np.sqrt(2),
'reset_time': reset_time,
'photons': False,
'quasistatic_flux': None,
'high_frequency': False,
'sampler': sampler
}
for key, val in kwargs.items():
param_dic[key] = val
return param_dic
def get_qubit(noise_flag=True,
scale=1,
t1=30000,
t2=30000,
dephasing_axis=1e-4,
dephasing_angle=5e-4,
dephasing=5e-4,
p_exc_init=0.0,
p_dec_init=0.005,
p_exc_fin=0.0,
p_dec_fin=0.015,
residual_excitations=0.01,
photons=False,
alpha0=4,
kappa=1 / 250,
chi=1.3 * 1e-3,
static_flux_std=None,
high_frequency=False,
dephase_var=1e-2/(2*pi),
msmt_time=600,
interval_time=150,
oneq_gate_time=20,
CZ_gate_time=40,
reset_time=500,
state=None,
sampler=None,
readout_error=0.005,
**kwargs):
"""
The dictionary for parameters of the DiCarlo qubits, with standard
parameters pre-set.
This is a bit messy right now, but has the advantage of telling
the user which parameters they can set. Not sure how to improve
over this.
"""
if sampler is None:
if noise_flag is True:
sampler = uniform_noisy_sampler(state=state,
readout_error=readout_error)
else:
readout_error = 0
sampler = uniform_sampler(state=state)
if static_flux_std is not None:
quasistatic_flux = static_flux_std * np.random.randn()
else:
quasistatic_flux = None
if noise_flag is True:
param_dic = {
't1': t1/scale,
't2': t2/scale,
'dephasing_axis': dephasing_axis*scale,
'dephasing': dephasing*scale,
'dephasing_angle': dephasing_angle*scale,
'dephase_var': dephase_var*scale,
'p_exc_init': p_exc_init*scale,
'p_dec_init': p_dec_init*scale,
'p_exc_fin': p_exc_fin*scale,
'p_dec_fin': p_dec_fin*scale,
'residual_excitations': residual_excitations*scale,
'msmt_time': msmt_time,
'interval_time': interval_time,
'oneq_gate_time': oneq_gate_time,
'CZ_gate_time': CZ_gate_time,
'ISwap_gate_time': CZ_gate_time*np.sqrt(2),
'reset_time': reset_time,
'photons': photons,
'alpha0': alpha0,
'kappa': kappa,
'chi': chi,
'quasistatic_flux': quasistatic_flux,
'high_frequency': high_frequency,
'sampler': sampler,
'readout_error': readout_error,
}
else:
param_dic = {
't1': np.inf,
't2': np.inf,
'dephasing_axis': 0,
'dephasing': 0,
'dephasing_angle': 0,
'dephase_var': 0,
'p_exc_init': 0,
'p_dec_init': 0,
'p_exc_fin': 0,
'p_dec_fin': 0,
'residual_excitations': 0,
'msmt_time': msmt_time,
'interval_time': interval_time,
'oneq_gate_time': oneq_gate_time,
'CZ_gate_time': CZ_gate_time,
'ISwap_gate_time': CZ_gate_time*np.sqrt(2),
'reset_time': reset_time,
'photons': False,
'quasistatic_flux': None,
'high_frequency': False,
'sampler': sampler,
'readout_error': 0,
}
for key, val in kwargs.items():
param_dic[key] = val
return param_dic
