def test_ramsey_no_detuning(self):
times = np.linspace(0, 5e-6, 41)
f_fix_pt = self.RO_pars['fixed_point_frequency']
# Sequence with no artificial detuning
seq, el_list = sqs.Ramsey_seq(times, self.pulse_pars, self.RO_pars,
artificial_detuning=None,
cal_points=True,
verbose=False,
upload=False,
return_seq=True)
self.assertEqual(len(times), len(seq.elements))
self.assertEqual(len(times), len(el_list))
for i, el in enumerate(el_list):
t_RO = el.effective_pulse_start_time('RO_tone-0', 'ch1')
t_ROm = el.effective_pulse_start_time('Acq-trigger-0', 'ch1')
self.assertAlmostEqual(t_RO, t_ROm, places=10)
# test if fix point put pulses at the right spot.
self.assertTrue(element.is_divisible_by_clock(t_RO, abs(f_fix_pt)))
# Check pulse delay
if i < (len(times)-4):
t0 = el.effective_pulse_start_time('pulse_0-0', 'ch1')
t1 = el.effective_pulse_start_time('pulse_1-0', 'ch1')
self.assertAlmostEqual(t1-t0, times[i], places=10)
p0 = el.pulses['pulse_0-0']
self.assertEqual(p0.phase, 0)
p1 = el.pulses['pulse_1-0']
self.assertEqual(p1.phase, 0)
else:
# Calibration points do not have two pulses
with self.assertRaises(KeyError):
t1 = el.effective_pulse_start_time('pulse_1-0', 'ch1')
def test_ramsey_freq_detuning(self):
times = np.linspace(0, 5e-6, 41)
for f_fix_pt in [50e-6, -50e-6]:
self.RO_pars['fixed_point_frequency'] = f_fix_pt
for RO_pulse_type in ['Gated_MW_RO_pulse', 'MW_IQmod_pulse_tek']:
self.RO_pars['pulse_type'] = RO_pulse_type
f_detuning = 300e3 # 300 kHz detuning
# Sequence with artificial detuning specified in Hz
seq, el_list = sqs.Ramsey_seq(times, self.pulse_pars,
self.RO_pars,
artificial_detuning=f_detuning,
cal_points=True,
verbose=False,
upload=False,
return_seq=True)
self.assertEqual(len(times), len(seq.elements))
self.assertEqual(len(times), len(el_list))
for i, el in enumerate(el_list):
if RO_pulse_type == 'MW_IQmod_pulse_tek':
t_RO = el.effective_pulse_start_time(
'RO_tone-0', 'ch1')
else:
t_RO = el.effective_pulse_start_time(
'RO_marker-0', 'ch1')
t_ROm = el.effective_pulse_start_time(
'Acq-trigger-0', 'ch1')
self.assertAlmostEqual(t_RO, t_ROm, places=10)
# test if fix point put pulses at the right spot.
self.assertTrue(
element.is_divisible_by_clock(t_RO, f_fix_pt))
# Check Ramsey pulse spacing
if i < (len(times)-4):
t0 = el.effective_pulse_start_time(
'pulse_0-0', 'ch1')
t1 = el.effective_pulse_start_time(
'pulse_1-0', 'ch1')
self.assertAlmostEqual(t1-t0, times[i], places=10)
p0 = el.pulses['pulse_0-0']
self.assertEqual(p0.phase, 0)
p1 = el.pulses['pulse_1-0']
exp_phase = (360*f_detuning*(t1-t0)) % 360
if exp_phase == 360:
exp_phase = 0
self.assertAlmostEqual(p1.phase, exp_phase, places=3)
else:
# Calibration points do not have two pulses
with self.assertRaises(KeyError):
t1 = el.effective_pulse_start_time(
'pulse_1-0', 'ch1')