def result_collector(self, result: dl.DUInt(dl.DSize(32))) -> bool:
"""Method to receive the results and update state.
Parameters
----------
result : int
Result from quantum HAL node.
Returns
-------
bool
Flag to signal to the circuit node to send again.
Raises
------
DeltaRuntimeExit
Stops the deltaflow program when statistics have been aggregated
"""
measurement = dl.lib.measurement_unpacker(result, [0])
self._results.append(measurement)
self._counter += 1
if self._counter == self._repetitions:
print("Expectation value: " +
f"{np.round(np.sum(self._results) / self._repetitions, 1)}")
raise dl.DeltaRuntimeExit
return True
def get_graph():
"""Return the experiments graph `DeltaGraph` and data store instances.
Note that the aggregator and commanger files can be provided with
`vcd_name` which will lead to saving VCD of all signals for further
debugging.
"""
result_storage = dl.lib.StateSaver(int)
cmds_storage = dl.lib.StateSaver(dl.DUInt(dl.DSize(32)))
hal_template = dl.lib.hal_template
with dl.DeltaGraph() as graph:
ph_hal_result = dl.placeholder_node_factory()
ph_commander = dl.placeholder_node_factory()
# aggregator node of HAL results
result_aggregator = Aggregator(
name="result_aggregator",
vcd_name=None).call(hal_result=ph_hal_result,
shot_completed=ph_commander.shot_completed)
# commander node to send HAL instructions
command_sender = Commander(
name="command_sender",
vcd_name=None).call(angle=result_aggregator.next_angle)
hal_result = hal_template.call(hal_command=command_sender.hal_command)
# local store for experiment results
result_storage.save(result_aggregator.agg_result)
cmds_storage.save(command_sender.hal_command)
# tie up placeholders
ph_hal_result.specify_by_node(hal_result)
ph_commander.specify_by_node(command_sender)
# listen for flag to stop runtime
experiment_stopper(result_aggregator.completed)
return graph, result_storage, cmds_storage
def migen_body(self, template):
# creation of input/output ports
angle = template.add_pa_in_port(
'angle',
dl.DOptional(dl.DRaw(dl.DUInt(dl.DSize(ANGLE_MEMORY_WIDTH))))
)
hal_command = template.add_pa_out_port('hal_command',
dl.DUInt(dl.DSize(32)))
shot_completed = template.add_pa_out_port('shot_completed',
dl.DBool())
# set up internal signals
_rotation_command = Signal(32)
self.comb += (
# declare input/output ports always happy to receive/transmit data
angle.ready.eq(1)
)
# define finite state machine for triggering HAL command sequences
self.submodules.commander_fsm = \
commander_fsm = FSM(reset_state="STATE_PREPARATION")
# waits for angle signal before kicking off HAL sequence
commander_fsm.act(
"STATE_PREPARATION",
NextValue(shot_completed.valid, 0),
If(
angle.valid == 1,
NextValue(
_rotation_command,
dl.lib.command_creator("RX", argument=angle.data)
),
NextValue(hal_command.valid, 1),
NextValue(
hal_command.data,
dl.lib.command_creator("STATE_PREPARATION")
),
NextState("ROTATION")
).Else(
NextValue(hal_command.valid, 0),
NextState("STATE_PREPARATION")
)
)
# align HAL command to rotation
commander_fsm.act(
"ROTATION",
NextValue(hal_command.valid, 1),
NextValue(hal_command.data, _rotation_command),
NextValue(shot_completed.valid, 0),
NextState("STATE_MEASURE")
)
# align HAL command to state measure
commander_fsm.act(
"STATE_MEASURE",
NextValue(hal_command.valid, 1),
NextValue(hal_command.data,
dl.lib.command_creator("STATE_MEASURE")),
NextValue(shot_completed.valid, 1),
NextValue(shot_completed.data, 1),
NextState("STATE_PREPARATION")
)
def migen_body(self, template):
# creation of input/output ports
shot_completed = template.add_pa_in_port('shot_completed',
dl.DOptional(dl.DBool()))
hal_result = template.add_pa_in_port(
'hal_result',
dl.DOptional(dl.DUInt(dl.DSize(32)))
)
agg_result = template.add_pa_out_port('agg_result',
dl.DInt(dl.DSize(32)))
# Completed is currently returning a simple 0/1 value but we make space
# for an error code to be returned e.g. 255, 0b11111111 can be in the
# future used to represent an error.
completed = template.add_pa_out_port('completed', dl.DInt(dl.DSize(8)))
next_angle = template.add_pa_out_port(
'next_angle',
dl.DRaw(dl.DUInt(dl.DSize(ANGLE_MEMORY_WIDTH)))
)
# generate a ROM of 10-bit angle values
angles = generate_angles(RESOLUTION)
self.specials.angle_memory = angle_memory = Memory(
ANGLE_MEMORY_WIDTH, len(angles), init=angles, name="ANGLE_ROM"
)
angle_rom_port = angle_memory.get_port(write_capable=False)
self.specials += angle_rom_port
# set up internal signals
_shots_counter = Signal(32)
_high_hal_results = Signal(32)
_reset_high_hal = Signal(1)
_angle_rom_index = Signal(RESOLUTION+1)
self.comb += (
# declare input/output ports always happy to receive/transmit data
hal_result.ready.eq(1),
shot_completed.ready.eq(1),
# align angle ROM address with ROM index signal
angle_rom_port.adr.eq(_angle_rom_index),
)
# define finite state machine for triggering angle and result signals
self.submodules.rabi_aggregator_fsm = \
rabi_aggregator_fsm = FSM(reset_state="IDLE")
# Logic to accumulate measurements
self.sync += (
If (_reset_high_hal == 1,
_high_hal_results.eq(0)
).Else (
If (hal_result.valid == 1,
If ((hal_result.data &
dl.lib.Masks.MEASUREMENTS.value) == 1,
_high_hal_results.eq(_high_hal_results + 1)
)
)
)
)
# waits for the experiment to be kicked off
rabi_aggregator_fsm.act(
"IDLE",
NextValue(agg_result.valid, 0),
NextValue(next_angle.valid, 0),
NextValue(completed.valid, 0),
NextValue(_shots_counter, 0),
NextValue(_reset_high_hal, 1),
NextState("DO_SHOTS")
)
rabi_aggregator_fsm.act(
"DO_SHOTS",
NextValue(agg_result.valid, 0),
NextValue(_reset_high_hal, 0),
If (_shots_counter == REPETITIONS,
NextState("CHECK_IF_COMPLETE"),
NextValue(_angle_rom_index, _angle_rom_index + 1),
NextValue(agg_result.data, _high_hal_results),
NextValue(agg_result.valid, 1),
NextValue(_reset_high_hal, 1),
).Else (
NextValue(next_angle.data, angle_rom_port.dat_r),
NextValue(next_angle.valid, 1),
NextState("WAIT_SHOT")
)
)
rabi_aggregator_fsm.act(
"WAIT_SHOT",
NextValue(next_angle.valid, 0),
If ((shot_completed.valid == 1) & (shot_completed.data == 1),
NextValue(_shots_counter, _shots_counter + 1),
NextState("DO_SHOTS"),
)
)
rabi_aggregator_fsm.act(
"CHECK_IF_COMPLETE",
NextState("IDLE"),
NextValue(agg_result.valid, 0),
If(_angle_rom_index == 2 ** RESOLUTION,
NextValue(completed.data, 1),
NextValue(completed.valid, 1),
)
)
import numpy as np
import deltalanguage as dl
### ---------------------------- CONSTRUCT NODES -------------------------- ###
# One node to send circuit to HAL node, another to digest result from HAL node
@dl.Interactive([("input_params", dl.DArray(int, dl.DSize(6))),
("repeat", bool)], dl.DUInt(dl.DSize(32)))
def send_gate_sequence(node):
"""Interactive node to define the circuit.
Accepts the circuit parameters and sends the HAL commands to the HAL node.
Parameters
----------
node : PythonNode
The node that sends the HAL command outputs.
"""
params = node.receive("input_params")
repeat = True
# send each gate at least once
while repeat:
node.send(dl.lib.command_creator("STATE_PREPARATION"))
node.send(dl.lib.command_creator("RX", argument=params[0]))
node.send(dl.lib.command_creator("RZ", argument=params[1]))
node.send(dl.lib.command_creator("RY", argument=params[2]))
node.send(dl.lib.command_creator("R", qubit=0))
node.send(dl.lib.command_creator("PIXY", argument=params[3]))
node.send(dl.lib.command_creator("PIYZ", argument=params[4]))
def migen_body(self, template):
_TIME_RES = 32
# Node inputs
self.time_in = template.add_pa_in_port('time_in',
dl.DOptional(dl.DUInt()))
# Node outputs
self.time_out = template.add_pa_out_port('time_out', dl.DUInt())
self.counter_reset = template.add_pa_out_port('counter_reset',
dl.DInt())
# Internal signals
self.pmt_reg = Signal(_TIME_RES)
self.rf_reg = Signal(_TIME_RES)
self.pmt_trig = Signal(1)
self.rf_trig = Signal(1)
self.submodules.fsm = FSM(reset_state="RESET_COUNTER")
self.sync += [
If(
self.pmt_trig,
self.pmt_reg.eq(self.time_in.data),
).Elif(self.fsm.ongoing("RESET_COUNTER"),
self.pmt_reg.eq(0)).Else(self.pmt_reg.eq(self.pmt_reg)),
If(
self.rf_trig,
self.rf_reg.eq(self.time_in.data),
).Elif(self.fsm.ongoing("RESET_COUNTER"),
self.rf_reg.eq(0)).Else(self.rf_reg.eq(self.rf_reg))
]
"""FSM
The FSM is used to control the readouts from the HPTDC chip and
generate a time signal for the accumulator
RESET_COUNTER
This is the dinitial state of the FSM at the start of the experiment.
It resets the "coarse counter" of the HPTDC chip to establish a TO
time reference.
WAIT_FOR_PMT
This state holds until the PMT timestamp is available at the HPTDC
chip readout (first data_ready sync pulse)
WAIT_FOR_RF
This state holds until the RMT timestamp is available at the HPTDC
chip readout (second data_ready sync pulse)
SEND_TIME
In this state, the difference between t_PMT and t_RF is derived and
sent to the accumulator.
WAIT_ACC_LATENCY
This state is used to wait for any delays on inter-node communication
"""
self.fsm.act(
"RESET_COUNTER",
self.pmt_trig.eq(0),
self.rf_trig.eq(0),
self.time_in.ready.eq(1),
self.counter_reset.data.eq(1), # reset counters
self.counter_reset.valid.eq(1),
NextState("WAIT_FOR_PMT"))
self.fsm.act(
"WAIT_FOR_PMT", self.counter_reset.data.eq(0),
self.time_in.ready.eq(1),
If(self.time_in.valid, self.pmt_trig.eq(1),
NextState("WAIT_FOR_RF")))
self.fsm.act(
"WAIT_FOR_RF", self.time_in.ready.eq(1),
If(self.time_in.valid, self.rf_trig.eq(1), NextState("SEND_TIME")))
self.fsm.act("SEND_TIME", self.time_in.ready.eq(1),
self.time_out.data.eq(self.rf_reg - self.pmt_reg),
self.time_out.valid.eq(1), NextState("WAIT_ACC_LATENCY"))
self.fsm.act("WAIT_ACC_LATENCY",
If(self.time_in.valid == 0, NextState("RESET_COUNTER")))
If(self.time_in.valid, self.pmt_trig.eq(1),
NextState("WAIT_FOR_RF")))
self.fsm.act(
"WAIT_FOR_RF", self.time_in.ready.eq(1),
If(self.time_in.valid, self.rf_trig.eq(1), NextState("SEND_TIME")))
self.fsm.act("SEND_TIME", self.time_in.ready.eq(1),
self.time_out.data.eq(self.rf_reg - self.pmt_reg),
self.time_out.valid.eq(1), NextState("WAIT_ACC_LATENCY"))
self.fsm.act("WAIT_ACC_LATENCY",
If(self.time_in.valid == 0, NextState("RESET_COUNTER")))
@dl.Interactive([('time_out', dl.DUInt()), ('reset', dl.DInt())], dl.DUInt())
def testbench(node):
""" Testbench for Timestamper interface node. Starts with random testing
and ends with corner cases
"""
_ITER = 10
for i in range(_ITER):
logging.debug(f'---Testbench iter {i}---')
time_pmt = random.randint(0, 100)
time_rf = random.randint(0, 100)
do_test(node, time_pmt, time_rf)
raise dl.DeltaRuntimeExit
def do_test(node, time_pmt, time_rf):
import numpy as np
import logging
import deltalanguage as dl
AccumT, AccumC = dl.make_forked_return({
'DAC_command': int,
'DAC_param': int,
'photon': int,
'reset': int
})
TIME_RES = 30
@dl.Interactive([('new_time', dl.DUInt()), ('DAC_status', int),
('DAC_voltage', int),
('experiment_start', dl.DOptional(bool))], AccumT)
def accumulator(node):
""" Accumulator Node
This node collects times sent from the counter FPGA node and issues
commands to the DAC controller.
This allows the node to collect data, fit to the data and feedback to the
experiment. The process can loop until some minimum threshold is reached,
allowing full automation of micromotion compensation.
Inputs:
- new_time: Time from Counter node
- DAC_status: DAC status from DAC node
