def run(
self,
presto_address: str,
presto_port: int = None,
ext_ref_clk: bool = False,
) -> str:
# Instantiate interface class
with pulsed.Pulsed(
address=presto_address,
port=presto_port,
ext_ref_clk=ext_ref_clk,
**CONVERTER_CONFIGURATION,
) as pls:
assert pls.hardware is not None
# figure out frequencies
assert self.readout_freq_center > (self.readout_freq_span / 2)
assert self.readout_freq_span < pls.get_fs(
"dac") / 2 # fits in HSB
readout_if_center = pls.get_fs("dac") / 4 # middle of HSB
readout_if_start = readout_if_center - self.readout_freq_span / 2
readout_if_stop = readout_if_center + self.readout_freq_span / 2
self.readout_if_arr = np.linspace(readout_if_start,
readout_if_stop,
self.readout_freq_nr)
self.readout_nco = self.readout_freq_center - readout_if_center
self.readout_freq_arr = self.readout_nco + self.readout_if_arr
pls.hardware.set_adc_attenuation(self.sample_port, 0.0)
pls.hardware.set_dac_current(self.readout_port, DAC_CURRENT)
pls.hardware.set_dac_current(self.control_port, DAC_CURRENT)
pls.hardware.set_inv_sinc(self.readout_port, 0)
pls.hardware.set_inv_sinc(self.control_port, 0)
pls.hardware.configure_mixer(
freq=self.readout_nco,
in_ports=self.sample_port,
out_ports=self.readout_port,
sync=False, # sync in next call
)
pls.hardware.configure_mixer(
freq=self.control_freq,
out_ports=self.control_port,
sync=True, # sync here
)
# ************************************
# *** Setup measurement parameters ***
# ************************************
# Setup lookup tables for frequencies
pls.setup_freq_lut(
output_ports=self.readout_port,
group=0,
frequencies=self.readout_if_arr,
phases=np.full_like(self.readout_if_arr, 0.0),
phases_q=np.full_like(self.readout_if_arr, -np.pi / 2), # HSB
)
pls.setup_freq_lut(
output_ports=self.control_port,
group=0,
frequencies=0.0,
phases=0.0,
phases_q=0.0,
)
# Setup lookup tables for amplitudes
pls.setup_scale_lut(
output_ports=self.readout_port,
group=0,
scales=self.readout_amp,
)
pls.setup_scale_lut(
output_ports=self.control_port,
group=0,
scales=self.control_amp,
)
# Setup readout and control pulses
# use setup_long_drive to create a pulse with square envelope
# setup_long_drive supports smooth rise and fall transitions for the pulse,
# but we keep it simple here
readout_pulse = pls.setup_long_drive(
output_port=self.readout_port,
group=0,
duration=self.readout_duration,
amplitude=1.0,
amplitude_q=1.0,
rise_time=0e-9,
fall_time=0e-9,
)
control_ns = int(round(self.control_duration * pls.get_fs("dac"))
) # number of samples in the control template
control_envelope = sin2(control_ns, drag=self.drag)
control_pulse = pls.setup_template(
output_port=self.control_port,
group=0,
template=control_envelope,
envelope=True,
)
# Setup sampling window
pls.set_store_ports(self.sample_port)
pls.set_store_duration(self.sample_duration)
# ******************************
# *** Program pulse sequence ***
# ******************************
T = 0.0 # s, start at time zero ...
for ii in range(2):
if ii > 0:
# pi pulse
pls.reset_phase(T, self.control_port)
pls.output_pulse(T, control_pulse)
# Readout pulse starts after control pulse
T += self.control_duration
pls.reset_phase(T, self.readout_port)
pls.output_pulse(T, readout_pulse)
# Sampling window
pls.store(T + self.readout_sample_delay)
# Move to next iteration
T += self.readout_duration
if ii > 0:
pls.next_frequency(T, self.readout_port)
T += self.wait_delay
# **************************
# *** Run the experiment ***
# **************************
pls.run(
period=T,
repeat_count=self.readout_freq_nr,
num_averages=self.num_averages,
print_time=True,
)
self.t_arr, self.store_arr = pls.get_store_data()
# if self.jpa_params is not None:
# pls.hardware.set_lmx(0.0, 0.0, self.jpa_params['pump_port'])
# pls.hardware.set_dc_bias(0.0, self.jpa_params['bias_port'])
return self.save()
def run(
self,
presto_address: str,
presto_port: int = None,
ext_ref_clk: bool = False,
) -> str:
# Instantiate interface class
with pulsed.Pulsed(
address=presto_address,
port=presto_port,
ext_ref_clk=ext_ref_clk,
**CONVERTER_CONFIGURATION,
) as pls:
assert pls.hardware is not None
pls.hardware.set_adc_attenuation(self.sample_port, 0.0)
pls.hardware.set_dac_current(self.readout_port, DAC_CURRENT)
pls.hardware.set_dac_current(self.control_port, DAC_CURRENT)
pls.hardware.set_inv_sinc(self.readout_port, 0)
pls.hardware.set_inv_sinc(self.control_port, 0)
pls.hardware.configure_mixer(
freq=self.readout_freq,
in_ports=self.sample_port,
out_ports=self.readout_port,
sync=False, # sync in next call
)
pls.hardware.configure_mixer(
freq=self.control_freq,
out_ports=self.control_port,
sync=True, # sync here
)
if self.jpa_params is not None:
pls.hardware.set_lmx(self.jpa_params['pump_freq'],
self.jpa_params['pump_pwr'],
self.jpa_params['pump_port'])
pls.hardware.set_dc_bias(self.jpa_params['bias'],
self.jpa_params['bias_port'])
pls.hardware.sleep(1.0, False)
# ************************************
# *** Setup measurement parameters ***
# ************************************
# Setup lookup tables for frequencies
# we only need to use carrier 1
pls.setup_freq_lut(
output_ports=self.readout_port,
group=0,
frequencies=0.0,
phases=0.0,
phases_q=0.0,
)
pls.setup_freq_lut(
output_ports=self.control_port,
group=0,
frequencies=0.0,
phases=0.0,
phases_q=0.0,
)
# Setup lookup tables for amplitudes
pls.setup_scale_lut(
output_ports=self.readout_port,
group=0,
scales=self.readout_amp,
)
pls.setup_scale_lut(
output_ports=self.control_port,
group=0,
scales=self.control_amp,
)
# Setup readout and control pulses
# use setup_long_drive to create a pulse with square envelope
# setup_long_drive supports smooth rise and fall transitions for the pulse,
# but we keep it simple here
readout_pulse = pls.setup_long_drive(
output_port=self.readout_port,
group=0,
duration=self.readout_duration,
amplitude=1.0,
amplitude_q=1.0,
rise_time=0e-9,
fall_time=0e-9,
)
control_ns = int(round(self.control_duration * pls.get_fs("dac"))
) # number of samples in the control template
control_envelope = sin2(control_ns, drag=self.drag)
control_pulse = pls.setup_template(
output_port=self.control_port,
group=0,
template=control_envelope,
template_q=control_envelope if self.drag == 0.0 else None,
envelope=True,
)
# Setup sampling window
pls.set_store_ports(self.sample_port)
pls.set_store_duration(self.sample_duration)
# ******************************
# *** Program pulse sequence ***
# ******************************
T = 0.0 # s, start at time zero ...
for delay in self.delay_arr:
# pi pulse
pls.reset_phase(T, self.control_port)
pls.output_pulse(T, control_pulse)
T += self.control_duration
# increasing delay
T += delay
# Readout
pls.reset_phase(T, self.readout_port)
pls.output_pulse(T, readout_pulse)
pls.store(T + self.readout_sample_delay)
T += self.readout_duration
# Wait for decay
T += self.wait_delay
if self.jpa_params is not None:
# adjust period to minimize effect of JPA idler
idler_freq = self.jpa_params['pump_freq'] - self.readout_freq
idler_if = abs(idler_freq -
self.readout_freq) # NCO at readout_freq
idler_period = 1 / idler_if
T_clk = int(round(T * pls.get_clk_f()))
idler_period_clk = int(round(idler_period * pls.get_clk_f()))
# first make T a multiple of idler period
if T_clk % idler_period_clk > 0:
T_clk += idler_period_clk - (T_clk % idler_period_clk)
# then make it off by one clock cycle
T_clk += 1
T = T_clk * pls.get_clk_T()
# **************************
# *** Run the experiment ***
# **************************
pls.run(
period=T,
repeat_count=1,
num_averages=self.num_averages,
print_time=True,
)
self.t_arr, self.store_arr = pls.get_store_data()
if self.jpa_params is not None:
pls.hardware.set_lmx(0.0, 0.0, self.jpa_params['pump_port'])
pls.hardware.set_dc_bias(0.0, self.jpa_params['bias_port'])
return self.save()
# use setup_long_drive to create a pulse with square envelope
# setup_long_drive supports smooth rise and fall transitions for the pulse,
# but we keep it simple here
readout_pulse = pls.setup_long_drive(
output_port=readout_port,
group=0,
duration=readout_duration,
amplitude=1.0,
amplitude_q=1.0,
rise_time=0e-9,
fall_time=0e-9,
)
control_ns = int(
round(control_duration *
pls.get_fs("dac"))) # number of samples in the control template
control_envelope = sin2(control_ns)
control_pulse = pls.setup_template(
output_port=control_port,
group=0,
template=control_envelope,
template_q=control_envelope,
envelope=True,
)
control_pulse_pi_div2 = pls.setup_template(
output_port=control_port,
group=0,
template=control_envelope / 2,
template_q=control_envelope / 2,
envelope=True,
)
def run(
self,
presto_address,
presto_port=None,
ext_ref_clk=False,
):
# Instantiate interface class
with pulsed.Pulsed(
address=presto_address,
port=presto_port,
ext_ref_clk=ext_ref_clk,
adc_mode=AdcMode.Mixed,
adc_fsample=AdcFSample.G2,
dac_mode=[DacMode.Mixed42, DacMode.Mixed02, DacMode.Mixed02, DacMode.Mixed02],
dac_fsample=[DacFSample.G10, DacFSample.G6, DacFSample.G6, DacFSample.G6],
) as pls:
pls.hardware.set_adc_attenuation(self.sample_port, 0.0)
pls.hardware.set_dac_current(self.readout_port, 32_000)
pls.hardware.set_dac_current(self.control_port, 32_000)
pls.hardware.set_inv_sinc(self.readout_port, 0)
pls.hardware.set_inv_sinc(self.control_port, 0)
pls.hardware.configure_mixer(
freq=self.readout_freq,
in_ports=self.sample_port,
out_ports=self.readout_port,
sync=False, # sync in next call
)
pls.hardware.configure_mixer(
freq=self.control_freq,
out_ports=self.control_port,
sync=True, # sync here
)
if self.jpa_params is not None:
pls.hardware.set_lmx(self.jpa_params['jpa_pump_freq'], self.jpa_params['jpa_pump_pwr'])
set_dc_bias(self.jpa_params['jpa_bias_port'], self.jpa_params['jpa_bias'])
time.sleep(1.0)
# ************************************
# *** Setup measurement parameters ***
# ************************************
# Setup lookup tables for frequencies
# we only need to use carrier 1
pls.setup_freq_lut(
output_ports=self.readout_port,
group=1,
frequencies=0.0,
phases=0.0,
phases_q=0.0,
)
pls.setup_freq_lut(
output_ports=self.readout_port,
group=0,
frequencies=0.0,
phases=0.0,
phases_q=0.0,
)
pls.setup_freq_lut(
output_ports=self.control_port,
group=0,
frequencies=0.0,
phases=0.0,
phases_q=0.0,
)
# Setup lookup tables for amplitudes
pls.setup_scale_lut(
output_ports=self.readout_port,
group=1,
scales=self.first_pulse_amp_arr,
)
pls.setup_scale_lut(
output_ports=self.readout_port,
group=0,
scales=self.readout_amp,
)
pls.setup_scale_lut(
output_ports=self.control_port,
group=0,
scales=self.control_amp,
)
# Setup readout and control pulses
# use setup_long_drive to create a pulse with square envelope
# setup_long_drive supports smooth rise and fall transitions for the pulse,
# but we keep it simple here
first_pulse = pls.setup_long_drive(
output_port=self.readout_port,
group=1,
duration=self.readout_duration,
amplitude=1.0,
amplitude_q=1.0,
rise_time=0e-9,
fall_time=0e-9,
)
readout_pulse = pls.setup_long_drive(
output_port=self.readout_port,
group=0,
duration=self.readout_duration,
amplitude=1.0,
amplitude_q=1.0,
rise_time=0e-9,
fall_time=0e-9,
)
control_ns = int(round(self.control_duration *
pls.get_fs("dac"))) # number of samples in the control template
control_envelope = sin2(control_ns)
control_pulse = pls.setup_template(
output_port=self.control_port,
group=0,
template=control_envelope,
template_q=control_envelope,
envelope=True,
)
# Setup sampling window
pls.set_store_ports(self.sample_port)
pls.set_store_duration(self.sample_duration)
# ******************************
# *** Program pulse sequence ***
# ******************************
T = 0.0 # s, start at time zero ...
for ramsey_delay in self.ramsey_delay_arr:
# first "readout" pulse
pls.reset_phase(T, self.readout_port)
pls.output_pulse(T, first_pulse)
T += self.readout_duration
T_end_first = T
# first pi/2 pulse
pls.reset_phase(T, self.control_port)
pls.output_pulse(T, control_pulse)
T += self.control_duration
# Ramsey delay
T += ramsey_delay
# second pi/2 pulse
pls.output_pulse(T, control_pulse)
T += self.control_duration
# Readout pulse starts after control pulse,
# `buffer_time` away from the first pulse
assert T <= T_end_first + self.buffer_time
T = T_end_first + self.buffer_time
pls.reset_phase(T, self.readout_port)
pls.output_pulse(T, readout_pulse)
# Sampling window
pls.store(T + self.readout_sample_delay)
# Move to next iteration
T += self.readout_duration
T += self.wait_delay
# next scale on first pulse
pls.next_scale(T, self.readout_port, 1)
T += self.wait_delay
# **************************
# *** Run the experiment ***
# **************************
pls.run(
period=T,
repeat_count=len(self.first_pulse_amp_arr),
num_averages=self.num_averages,
print_time=True,
)
t_arr, (data_I, data_Q) = pls.get_store_data()
if self.jpa_params is not None:
pls.hardware.set_lmx(0.0, 0.0)
set_dc_bias(self.jpa_params['jpa_bias_port'], 0.0)
self.t_arr = t_arr
self.store_arr = data_I + 1j * data_Q
return self.save()
def measure_t1(which_qubit):
if which_qubit == 1:
readout_freq = readout_freq_1
control_freq = control_freq_1
control_amp = control_amp_pi_1
control_port = control_port_1
else:
readout_freq = readout_freq_2
control_freq = control_freq_2
control_amp = control_amp_pi_2
control_port = control_port_2
nr_delays = 128 # number of steps when changing delay between control and readout pulses
dt_delays = 4 * 1e-6 # s, step size when changing delay between control and readout pulses
with pulsed.Pulsed(
address=ADDRESS,
ext_ref_clk=EXT_REF_CLK,
adc_mode=AdcMode.Mixed,
adc_fsample=AdcFSample.G2,
dac_mode=[
DacMode.Mixed42, DacMode.Mixed02, DacMode.Mixed02,
DacMode.Mixed02
],
dac_fsample=[
DacFSample.G10, DacFSample.G6, DacFSample.G6, DacFSample.G6
],
) as pls:
pls.hardware.set_adc_attenuation(sample_port, 0.0)
pls.hardware.set_dac_current(readout_port, 32_000)
pls.hardware.set_dac_current(control_port, 32_000)
pls.hardware.set_inv_sinc(readout_port, 0)
pls.hardware.set_inv_sinc(control_port, 0)
pls.hardware.configure_mixer(
freq=readout_freq,
in_ports=sample_port,
out_ports=readout_port,
sync=False, # sync in next call
)
pls.hardware.configure_mixer(
freq=control_freq,
out_ports=control_port,
sync=True, # sync here
)
# ************************************
# *** Setup measurement parameters ***
# ************************************
# Setup lookup tables for frequencies
# we only need to use carrier 1
pls.setup_freq_lut(
output_ports=readout_port,
group=0,
frequencies=0.0,
phases=0.0,
phases_q=0.0,
)
pls.setup_freq_lut(
output_ports=control_port,
group=0,
frequencies=0.0,
phases=0.0,
phases_q=0.0,
)
# Setup lookup tables for amplitudes
pls.setup_scale_lut(
output_ports=readout_port,
group=0,
scales=readout_amp,
)
pls.setup_scale_lut(
output_ports=control_port,
group=0,
scales=control_amp,
)
# Setup readout and control pulses
# use setup_long_drive to create a pulse with square envelope
# setup_long_drive supports smooth rise and fall transitions for the pulse,
# but we keep it simple here
readout_pulse = pls.setup_long_drive(
output_port=readout_port,
group=0,
duration=readout_duration,
amplitude=1.0,
amplitude_q=1.0,
rise_time=0e-9,
fall_time=0e-9,
)
control_ns = int(round(
control_duration *
pls.get_fs("dac"))) # number of samples in the control template
control_envelope = sin2(control_ns)
control_pulse = pls.setup_template(
output_port=control_port,
group=0,
template=control_envelope,
template_q=control_envelope,
envelope=True,
)
# Setup sampling window
pls.set_store_ports(sample_port)
pls.set_store_duration(sample_duration)
# ******************************
# *** Program pulse sequence ***
# ******************************
T = 0.0 # s, start at time zero ...
for ii in range(nr_delays):
# pi pulse
pls.reset_phase(T, control_port)
pls.output_pulse(T, control_pulse)
# Readout pulse starts after control pulse,
# with an increasing delay
T += control_duration + ii * dt_delays
pls.reset_phase(T, readout_port)
pls.output_pulse(T, readout_pulse)
# Sampling window
pls.store(T + readout_sample_delay)
# Move to next iteration
T += readout_duration
T += wait_delay
# **************************
# *** Run the experiment ***
# **************************
pls.run(
period=T,
repeat_count=1,
num_averages=num_averages,
print_time=True,
)
t_arr, (data_I, data_Q) = pls.get_store_data()
store_arr = data_I + 1j * data_Q
idx_low = np.argmin(np.abs(t_arr - t_low))
idx_high = np.argmin(np.abs(t_arr - t_high))
idx = np.arange(idx_low, idx_high)
# Analyze T1
resp_arr = np.mean(store_arr[:, 0, idx], axis=-1)
resp_arr = rotate_opt(resp_arr)
delay_arr = dt_delays * np.arange(nr_delays)
# Fit data
popt_x, perr_x = t1_fit_simple(delay_arr, np.real(resp_arr))
T1 = popt_x[0]
T1_err = perr_x[0]
return T1, T1_err
def run(
self,
presto_address: str,
presto_port: int = None,
ext_ref_clk: bool = False,
) -> str:
with pulsed.Pulsed(
address=presto_address,
port=presto_port,
ext_ref_clk=ext_ref_clk,
**CONVERTER_CONFIGURATION,
) as pls:
assert pls.hardware is not None
# figure out frequencies
assert self.control_freq_center > (self.control_freq_span / 2)
assert self.control_freq_span < pls.get_fs(
"dac") / 2 # fits in HSB
control_if_center = pls.get_fs("dac") / 4 # middle of HSB
control_if_start = control_if_center - self.control_freq_span / 2
control_if_stop = control_if_center + self.control_freq_span / 2
control_if_arr = np.linspace(control_if_start, control_if_stop,
self.control_freq_nr)
control_nco = self.control_freq_center - control_if_center
self.control_freq_arr = control_nco + control_if_arr
pls.hardware.set_adc_attenuation(self.sample_port, 0.0)
pls.hardware.set_dac_current(self.readout_port, DAC_CURRENT)
pls.hardware.set_dac_current(self.control_port, DAC_CURRENT)
pls.hardware.set_inv_sinc(self.readout_port, 0)
pls.hardware.set_inv_sinc(self.control_port, 0)
pls.hardware.configure_mixer(
freq=self.readout_freq,
in_ports=self.sample_port,
out_ports=self.readout_port,
sync=False, # sync in next call
)
pls.hardware.configure_mixer(
freq=control_nco,
out_ports=self.control_port,
sync=True, # sync here
)
if self.jpa_params is not None:
pls.hardware.set_lmx(self.jpa_params['pump_freq'],
self.jpa_params['pump_pwr'],
self.jpa_params['pump_port'])
pls.hardware.set_dc_bias(self.jpa_params['bias'],
self.jpa_params['bias_port'])
pls.hardware.sleep(1.0, False)
# ************************************
# *** Setup measurement parameters ***
# ************************************
# Setup lookup tables for frequencies
pls.setup_freq_lut(
output_ports=self.readout_port,
group=0,
frequencies=0.0,
phases=0.0,
phases_q=0.0,
)
pls.setup_freq_lut(
output_ports=self.control_port,
group=0,
frequencies=control_if_arr,
phases=np.full_like(control_if_arr, 0.0),
phases_q=np.full_like(control_if_arr, -np.pi / 2), # HSB
)
# Setup lookup tables for amplitudes
pls.setup_scale_lut(
output_ports=self.readout_port,
group=0,
scales=self.readout_amp,
)
pls.setup_scale_lut(
output_ports=self.control_port,
group=0,
scales=self.control_amp,
)
# Setup readout and control pulses
# use setup_long_drive to create a pulse with square envelope
# setup_long_drive supports smooth rise and fall transitions for the pulse,
# but we keep it simple here
readout_pulse = pls.setup_long_drive(
output_port=self.readout_port,
group=0,
duration=self.readout_duration,
amplitude=1.0,
amplitude_q=1.0,
rise_time=0e-9,
fall_time=0e-9,
)
# For the control pulse we create a sine-squared envelope,
# and use setup_template to use the user-defined envelope
control_ns = int(round(self.control_duration * pls.get_fs("dac"))
) # number of samples in the control template
control_envelope = sin2(control_ns)
control_pulse = pls.setup_template(
output_port=self.control_port,
group=0,
template=control_envelope,
template_q=control_envelope,
envelope=True,
)
# Setup sampling window
pls.set_store_ports(self.sample_port)
pls.set_store_duration(self.sample_duration)
# ******************************
# *** Program pulse sequence ***
# ******************************
T = 0.0 # s, start at time zero ...
# Control pulse
pls.reset_phase(T, self.control_port)
pls.output_pulse(T, control_pulse)
# Readout pulse starts right after control pulse
T += self.control_duration
pls.reset_phase(T, self.readout_port)
pls.output_pulse(T, readout_pulse)
# Sampling window
pls.store(T + self.readout_sample_delay)
# Move to next Rabi amplitude
T += self.readout_duration
pls.next_frequency(
T, self.control_port
) # every iteration will have a different frequency
# Wait for decay
T += self.wait_delay
if self.jpa_params is not None:
# adjust period to minimize effect of JPA idler
idler_freq = self.jpa_params['pump_freq'] - self.readout_freq
idler_if = abs(idler_freq -
self.readout_freq) # NCO at readout_freq
idler_period = 1 / idler_if
T_clk = int(round(T * pls.get_clk_f()))
idler_period_clk = int(round(idler_period * pls.get_clk_f()))
# first make T a multiple of idler period
if T_clk % idler_period_clk > 0:
T_clk += idler_period_clk - (T_clk % idler_period_clk)
# then make it off by one clock cycle
T_clk += 1
T = T_clk * pls.get_clk_T()
# **************************
# *** Run the experiment ***
# **************************
# repeat the whole sequence `rabi_n` times
# then average `num_averages` times
pls.run(
period=T,
repeat_count=self.control_freq_nr,
num_averages=self.num_averages,
print_time=True,
)
self.t_arr, self.store_arr = pls.get_store_data()
if self.jpa_params is not None:
pls.hardware.set_lmx(0.0, 0.0, self.jpa_params['pump_port'])
pls.hardware.set_dc_bias(0.0, self.jpa_params['bias_port'])
return self.save()