# Repository: https://gitlab.com/quantify-os/quantify-scheduler
# Licensed according to the LICENCE file on the main branch
"""Compilation backend for quantum-circuit to quantum-device layer."""
from __future__ import annotations
import warnings
from copy import deepcopy
from itertools import permutations
from typing import Dict
import numpy as np
from quantify_scheduler.backends.graph_compilation import (
CompilationConfig,
DeviceCompilationConfig,
OperationCompilationConfig,
)
from quantify_scheduler.backends.qblox.enums import ChannelMode
from quantify_scheduler.operations.operation import Operation
from quantify_scheduler.resources import ClockResource
from quantify_scheduler.schedules.schedule import Schedule, Schedulable
[docs]
def _compile_circuit_to_device(
schedule: Schedule,
config: CompilationConfig | DeviceCompilationConfig | Dict | None = None,
# config can be DeviceCompilationConfig and Dict to support (deprecated) calling
# with device_cfg as positional argument.
*, # Support for (deprecated) calling with device_cfg as keyword argument:
device_cfg: DeviceCompilationConfig | Dict | None = None,
) -> Schedule:
"""
Add pulse information to all gates in the schedule.
Before calling this function, the schedule can contain abstract operations (gates or
measurements). This function adds pulse and acquisition information with respect to
``config`` as they are expected to arrive to device (latency or distortion corrections
are not taken into account).
From a point of view of :ref:`sec-compilation`, this function converts a schedule
defined on a quantum-circuit layer to a schedule defined on a quantum-device layer.
Parameters
----------
schedule
The schedule to be compiled.
config
Compilation config for
:class:`~quantify_scheduler.backends.graph_compilation.QuantifyCompiler`, of
which only the :attr:`.CompilationConfig.device_compilation_config`
is used in this compilation step.
device_cfg
(deprecated) Device compilation config. Pass a full compilation config instead
using ``config`` argument. Note, if a dictionary is passed, it will be parsed to a
:class:`~.DeviceCompilationConfig`.
Returns
-------
:
The modified ``schedule`` with pulse information added to all gates.
Raises
------
ValueError
When both ``config`` and ``device_cfg`` are supplied.
"""
if (config is not None) and (device_cfg is not None):
raise ValueError(
f"`{_compile_circuit_to_device.__name__}` was called with {config=} "
f"and {device_cfg=}. Please make sure this function is called with "
f"only one of the two (CompilationConfig recommended)."
)
if not isinstance(config, CompilationConfig):
warnings.warn(
f"`{_compile_circuit_to_device.__name__}` will require a full "
f"CompilationConfig as input as of quantify-scheduler >= 0.19.0",
FutureWarning,
)
if isinstance(config, CompilationConfig):
device_cfg = config.device_compilation_config
elif config is not None:
# Support for (deprecated) calling with device_cfg as positional argument:
device_cfg = config
if device_cfg is None:
# This is a special case to be supported to enable compilation for schedules
# that are defined completely at the quantum-device layer and require no
# circuit to device compilation.
# A better solution would be to omit skip this compile call in a backend,
# but this is supported for backwards compatibility reasons.
return schedule
elif not isinstance(device_cfg, DeviceCompilationConfig):
if "backend" in device_cfg:
raise ValueError(
f"`{DeviceCompilationConfig.__name__}` no longer takes a"
f" 'backend' field; please remove it."
)
device_cfg = DeviceCompilationConfig.model_validate(device_cfg)
for op_key in schedule.operations:
# If operation is a valid pulse or acquisition it will not attempt to
# add pulse/acquisition info in the lines below (if operation.valid_gate
# will not work here for e.g. Measure, which is also a valid
# acquisition)
if isinstance(schedule.operations[op_key], Schedule):
schedule.operations[op_key] = _compile_circuit_to_device(
schedule=schedule.operations[op_key], config=config
)
elif not (
schedule.operations[op_key].valid_pulse
or schedule.operations[op_key].valid_acquisition
):
qubits = schedule.operations[op_key].data["gate_info"]["qubits"]
operation_type = schedule.operations[op_key].data["gate_info"][
"operation_type"
]
# single qubit operations
if len(qubits) == 1:
schedule.operations[op_key] = _compile_single_qubit(
operation=schedule.operations[op_key],
qubit=qubits[0],
operation_type=operation_type,
device_cfg=device_cfg,
config=config,
)
# it is a two-qubit operation if the operation not in the qubit config
elif (
len(qubits) == 2
and operation_type not in device_cfg.elements[qubits[0]]
):
schedule.operations[op_key] = _compile_two_qubits(
operation=schedule.operations[op_key],
qubits=qubits,
operation_type=operation_type,
device_cfg=device_cfg,
config=config,
)
# we only support 2-qubit operations and single-qubit operations.
# some single-qubit operations (reset, measure) can be expressed as acting
# on multiple qubits simultaneously. That is covered through this for-loop.
else:
schedule.operations[op_key] = _compile_multiplexed(
operation=schedule.operations[op_key],
qubits=qubits,
operation_type=operation_type,
device_cfg=device_cfg,
config=config,
)
return schedule
[docs]
def compile_circuit_to_device(
schedule: Schedule,
config: CompilationConfig | DeviceCompilationConfig | Dict | None = None,
# config can be DeviceCompilationConfig and Dict to support (deprecated) calling
# with device_cfg as positional argument.
*, # Support for (deprecated) calling with device_cfg as keyword argument:
device_cfg: DeviceCompilationConfig | Dict | None = None,
) -> Schedule:
"""Add pulse information to all gates in the schedule."""
warnings.warn(
f"Calling {compile_circuit_to_device.__name__} directly is deprecated "
f"and will be removed from the public interface in quantify-scheduler "
f">= 0.21.0. Please use `QuantifyCompiler` instead, which calls "
f"{_compile_circuit_to_device.__name__} as a compilation node.",
FutureWarning,
)
return _compile_circuit_to_device(
schedule=deepcopy(schedule), config=config, device_cfg=device_cfg
)
[docs]
def set_pulse_and_acquisition_clock(
schedule: Schedule,
config: CompilationConfig | DeviceCompilationConfig | Dict | None = None,
# config can be DeviceCompilationConfig and Dict to support (deprecated) calling
# with device_cfg as positional argument.
*, # Support for (deprecated) calling with device_cfg as keyword argument:
device_cfg: DeviceCompilationConfig | Dict | None = None,
) -> Schedule:
"""
Ensures that each pulse/acquisition-level clock resource is added to the schedule.
If a pulse/acquisition-level clock resource has not been added
to the schedule and is present in device_cfg, it is added to the schedule.
A warning is given when a clock resource has conflicting frequency
definitions, and an error is raised if the clock resource is unknown.
Parameters
----------
schedule
The schedule to be compiled.
config
Compilation config for
:class:`~quantify_scheduler.backends.graph_compilation.QuantifyCompiler`, of
which only the :attr:`.CompilationConfig.device_compilation_config`
is used in this compilation step.
device_cfg
(deprecated) Device compilation config. Pass a full compilation config instead
using ``config`` argument. Note, if a dictionary is passed, it will be parsed to a
:class:`~.DeviceCompilationConfig`.
Returns
-------
:
The modified ``schedule`` with all clock resources added.
Warns
-----
RuntimeWarning
When clock has conflicting frequency definitions.
Raises
------
RuntimeError
When operation is not at pulse/acquisition-level.
ValueError
When both ``config`` and ``device_cfg`` are supplied.
ValueError
When clock frequency is unknown.
ValueError
When clock frequency is NaN.
"""
if (config is not None) and (device_cfg is not None):
raise ValueError(
f"`{set_pulse_and_acquisition_clock.__name__}` was called with {config=} "
f"and {device_cfg=}. Please make sure this function is called with "
f"only one of the two (CompilationConfig recommended)."
)
if not isinstance(config, CompilationConfig):
warnings.warn(
f"`{set_pulse_and_acquisition_clock.__name__}` will require a full "
f"CompilationConfig as input as of quantify-scheduler >= 0.19.0",
FutureWarning,
)
if isinstance(config, CompilationConfig):
device_cfg = config.device_compilation_config
elif config is not None:
# Support for (deprecated) calling with device_cfg as positional argument:
device_cfg = config
if device_cfg is None:
# this is a special case to be supported to enable compilation for schedules
# that are defined completely at the quantum-device layer and require no
# circuit to device compilation.
# A better solution would be to omit skip this compile call in a backend,
# but this is supported for backwards compatibility reasons.
return schedule
elif not isinstance(device_cfg, DeviceCompilationConfig):
if "backend" in device_cfg:
raise ValueError(
f"`{DeviceCompilationConfig.__name__}` no longer takes a"
f" 'backend' field; please remove it."
)
device_cfg = DeviceCompilationConfig.model_validate(device_cfg)
assert isinstance(device_cfg, DeviceCompilationConfig)
# verify that required clocks are present; print warning if they are inconsistent
verified_clocks = []
for key, operation in schedule.operations.items():
# Only if we have a valid device-level operation, we can assign clocks
if isinstance(operation, Schedule):
schedule.operations[key] = set_pulse_and_acquisition_clock(
operation, config
)
else:
_assert_operation_valid_device_level(operation)
operation_info = operation["pulse_info"] + operation["acquisition_info"]
clocks_used = set([info["clock"] for info in operation_info])
for clock in clocks_used:
# In digital channels clocks are non-existant, so we skip them.
if clock == ChannelMode.DIGITAL:
continue
if clock in verified_clocks:
continue
# raises ValueError if no clock found;
# enters if condition if clock only in device config
if not _valid_clock_in_schedule(clock, device_cfg, schedule, operation):
clock_resource = ClockResource(
name=clock, freq=device_cfg.clocks[clock]
)
schedule.add_resource(clock_resource)
verified_clocks.append(clock)
return schedule
[docs]
def _valid_clock_in_schedule(clock, device_cfg, schedule, operation) -> bool:
"""
Asserts that valid clock is present. Returns whether clock is already in schedule.
Parameters
----------
clock
Name of the clock
device_cfg
Device config that potentially contains the clock.
schedule
Schedule that potentially has the clock in its resources
operation
Quantify operation, to which the clock belongs. Only used for error message.
Raises
------
ValueError
Returns ValueError if (i) the device config is the only defined clock and
contains nan values or (ii) no clock is defined.
"""
if clock in schedule.resources:
if clock in device_cfg.clocks:
# Test if clocks are compatible (emits a warning if not)
_ = _clocks_compatible(clock, device_cfg, schedule)
return True
else:
if clock in device_cfg.clocks:
# Clock only in device config
if np.isnan(device_cfg.clocks[clock]).any():
raise ValueError(
f"Operation '{operation}' contains clock '{clock}' with an "
f"undefined (initial) frequency; ensure this resource has been "
f"added to the schedule or to the device config."
)
return False
# Clock neither in device config nor schedule.
raise ValueError(
f"Operation '{operation}' contains an unknown clock '{clock}'; "
f"ensure this resource has been added to the schedule "
f"or to the device config."
)
[docs]
def _clocks_compatible(clock, device_cfg: DeviceCompilationConfig, schedule) -> bool:
"""
Compare device config and schedule resources for compatibility of their clocks.
Clocks can be defined in the device_cfg and in the schedule. They are consistent if
- they have the same value
- if the clock in the device config is nan (not the other way around)
These conditions are also generalized to numpy arrays. Arrays of different length
are only equal if all frequencies in the device config are nan.
If the clocks are inconsistent, a warning message is emitted.
Parameters
----------
clock
Name of the clock found in the device config and schedule
device_cfg
Device config containing the ``clock``
schedule
Schedule containing the ``clock``
Returns
-------
True if the clock frequencies are consistent.
"""
clock_freq_device_cfg = np.asarray(device_cfg.clocks[clock])
clock_freq_schedule = np.asarray(schedule.resources[clock]["freq"])
is_nan = np.isnan(clock_freq_device_cfg)
if is_nan.all():
return True
try:
is_equal = clock_freq_device_cfg == clock_freq_schedule
except ValueError:
return False
if (np.logical_or(is_nan, is_equal)).all():
return True
warnings.warn(
f"Clock '{clock}' has conflicting frequency definitions: "
f"{clock_freq_schedule} Hz in the schedule and "
f"{clock_freq_device_cfg} Hz in the device config. "
f"The clock is set to '{clock_freq_schedule}'. "
f"Ensure the schedule clock resource matches the "
f"device config clock frequency or set the "
f"clock frequency in the device config to np.NaN "
f"to omit this warning.",
RuntimeWarning,
)
return False
[docs]
def _assert_operation_valid_device_level(operation: Operation) -> None:
"""
Verifies that the operation has been compiled to device level.
Parameters
----------
operation
Quantify operation
"""
if not (
operation.valid_pulse
or operation.valid_acquisition
or operation.has_voltage_offset
):
raise RuntimeError(
f"Operation '{operation}' is a gate-level operation and must be "
f"compiled from circuit to device; ensure compilation "
f"is made in the correct order."
)
[docs]
def _compile_multiplexed(
operation,
qubits,
operation_type,
device_cfg,
config: CompilationConfig | DeviceCompilationConfig | Dict | None,
) -> Schedule:
"""
Compiles gate with multiple qubits.
Note: it updates the `operation`, if it can directly add pulse representation.
"""
inner_subschedules: list = []
operation_has_device_representation: bool = False
for mux_idx, qubit in enumerate(qubits):
if qubit not in device_cfg.elements:
raise ConfigKeyError(
kind="element",
missing=qubit,
allowed=list(device_cfg.elements.keys()),
)
element_cfg = device_cfg.elements[qubit]
if operation_type not in element_cfg:
raise ConfigKeyError(
kind="operation",
missing=operation_type,
allowed=list(element_cfg.keys()),
)
device_op: Operation | Schedule = _get_device_repr_from_cfg_multiplexed(
operation, element_cfg[operation_type], mux_idx=mux_idx
)
if isinstance(device_op, Schedule):
inner_subschedules.append(_compile_circuit_to_device(device_op, config))
else:
operation.add_device_representation(device_op)
operation_has_device_representation = True
if len(inner_subschedules) != 0:
inner_schedule: Schedule = Schedule(f"Inner schedule for {str(operation)}")
# All operations in the inner schedule
# should happen at the same time;
# this reference time is the start time
# of the `ref_schedulable` operation / schedule
ref_schedulable: Schedulable | None = None
if operation_has_device_representation:
ref_schedulable = inner_schedule.add(operation)
for inner_subschedule in inner_subschedules:
if ref_schedulable is not None:
inner_schedule.add(
operation=_compile_circuit_to_device(inner_subschedule, config),
rel_time=0,
ref_op=ref_schedulable,
ref_pt="start",
)
else:
ref_schedulable = inner_schedule.add(
operation=_compile_circuit_to_device(inner_subschedule, config),
)
return inner_schedule
else:
return operation
[docs]
def _compile_single_qubit(
operation,
qubit,
operation_type,
device_cfg,
config: CompilationConfig | DeviceCompilationConfig | Dict | None,
) -> Operation | Schedule:
"""
Compiles gate with multiple qubits.
Note: it updates the `operation`, if it can directly add pulse representation.
"""
if qubit not in device_cfg.elements:
raise ConfigKeyError(
kind="element",
missing=qubit,
allowed=list(device_cfg.elements.keys()),
)
element_cfg = device_cfg.elements[qubit]
if operation_type not in element_cfg:
raise ConfigKeyError(
kind="operation",
missing=operation_type,
allowed=list(element_cfg.keys()),
)
device_op: Operation | Schedule = _get_device_repr_from_cfg(
operation=operation,
operation_cfg=element_cfg[operation_type],
)
if isinstance(device_op, Schedule):
return _compile_circuit_to_device(device_op, config)
else:
operation.add_device_representation(device_op)
return operation
[docs]
def _compile_two_qubits(
operation,
qubits,
operation_type,
device_cfg,
config: CompilationConfig | DeviceCompilationConfig | Dict | None,
) -> Operation | Schedule:
"""
Compiles gate with multiple qubits.
Note: it updates the `operation`, if it can directly add pulse representation.
"""
parent_qubit, child_qubit = qubits
edge = f"{parent_qubit}_{child_qubit}"
symmetric_operation = operation.get("gate_info", {}).get("symmetric", False)
if symmetric_operation:
possible_permutations = permutations(qubits, 2)
operable_edges = {
f"{permutation[0]}_{permutation[1]}"
for permutation in possible_permutations
}
valid_edge_list = list(operable_edges.intersection(device_cfg.edges))
if len(valid_edge_list) == 1:
edge = valid_edge_list[0]
elif len(valid_edge_list) < 1:
raise ConfigKeyError(
kind="edge", missing=edge, allowed=list(device_cfg.edges.keys())
)
elif len(valid_edge_list) > 1:
raise MultipleKeysError(operation=operation_type, matches=valid_edge_list)
if edge not in device_cfg.edges:
raise ConfigKeyError(
kind="edge", missing=edge, allowed=list(device_cfg.edges.keys())
)
edge_config = device_cfg.edges[edge]
if operation_type not in edge_config:
# only raise exception if it is also not a single-qubit operation
raise ConfigKeyError(
kind="operation",
missing=operation_type,
allowed=list(edge_config.keys()),
)
device_op: Operation | Schedule = _get_device_repr_from_cfg(
operation, edge_config[operation_type]
)
if isinstance(device_op, Schedule):
return _compile_circuit_to_device(device_op, config)
else:
operation.add_device_representation(device_op)
return operation
[docs]
def _get_device_repr_from_cfg(
operation: Operation, operation_cfg: OperationCompilationConfig
) -> Operation | Schedule:
# deepcopy because operation_type can occur multiple times
# (e.g., parametrized operations).
operation_cfg = deepcopy(operation_cfg)
factory_func = operation_cfg.factory_func
factory_kwargs: Dict = operation_cfg.factory_kwargs
# retrieve keyword args for parametrized operations from the gate info
if operation_cfg.gate_info_factory_kwargs is not None:
for key in operation_cfg.gate_info_factory_kwargs:
factory_kwargs[key] = operation.data["gate_info"][key]
return factory_func(**factory_kwargs)
[docs]
def _get_device_repr_from_cfg_multiplexed(
operation: Operation, operation_cfg: OperationCompilationConfig, mux_idx: int
) -> Operation | Schedule:
operation_cfg = deepcopy(operation_cfg)
factory_func = operation_cfg.factory_func
factory_kwargs: Dict = operation_cfg.factory_kwargs
# retrieve keyword args for parametrized operations from the gate info
if operation_cfg.gate_info_factory_kwargs is not None:
for key in operation_cfg.gate_info_factory_kwargs:
gate_info = operation.data["gate_info"][key]
# Hack alert: not all parameters in multiplexed operation are
# necessary passed for each element separately. We assume that if they do
# (say, acquisition index and channel for measurement), they are passed as
# a list or tuple. If they don't (say, it is hard to imagine different
# acquisition protocols for qubits during multiplexed readout), they are
# assumed to NOT be a list or tuple. If this spoils the correct behaviour of
# your program in future: sorry :(
if isinstance(gate_info, (tuple, list)):
factory_kwargs[key] = gate_info[mux_idx]
else:
factory_kwargs[key] = gate_info
return factory_func(**factory_kwargs)
# pylint: disable=super-init-not-called
[docs]
class ConfigKeyError(KeyError):
"""Custom exception for when a key is missing in a configuration file."""
def __init__(self, kind, missing, allowed):
self.value = (
f'{kind} "{missing}" is not present in the configuration file;'
+ f" {kind} must be one of the following: {allowed}"
)
def __str__(self):
return repr(self.value)
# pylint: disable=super-init-not-called
[docs]
class MultipleKeysError(KeyError):
"""Custom exception for when symmetric keys are found in a configuration file."""
def __init__(self, operation, matches):
self.value = (
f"Symmetric Operation {operation} matches the following edges {matches}"
f" in the QuantumDevice. You can only specify a single edge for a symmetric"
" operation."
)
def __str__(self):
return repr(self.value)
