# Repository: https://gitlab.com/quantify-os/quantify-scheduler
# Licensed according to the LICENCE file on the main branch
"""Module containing the QuantumDevice object."""
from __future__ import annotations
import json
from typing import Any
from qcodes.instrument.base import Instrument
from qcodes.instrument.parameter import InstrumentRefParameter, ManualParameter
from qcodes.utils import validators
from quantify_scheduler.backends.graph_compilation import (
DeviceCompilationConfig,
SerialCompilationConfig,
SimpleNodeConfig,
)
from quantify_scheduler.backends.qblox_backend import QbloxHardwareCompilationConfig
from quantify_scheduler.backends.types.common import (
HardwareCompilationConfig,
HardwareOptions,
)
from quantify_scheduler.device_under_test.device_element import DeviceElement
from quantify_scheduler.device_under_test.edge import Edge
from quantify_scheduler.device_under_test.hardware_config import HardwareConfig
from quantify_scheduler.helpers.importers import (
export_python_object_to_path_string,
import_python_object_from_string,
)
from quantify_scheduler.json_utils import (
JSONSerializableMixin,
SchedulerJSONDecoder,
SchedulerJSONEncoder,
)
[docs]
class QuantumDevice(JSONSerializableMixin, Instrument):
"""
The QuantumDevice directly represents the device under test (DUT).
This contains a description of the connectivity to the control hardware as
well as parameters specifying quantities like cross talk, attenuation and
calibrated cable-delays. The QuantumDevice also contains references to
individual DeviceElements, representations of elements on a device (e.g, a
transmon qubit) containing the (calibrated) control-pulse parameters.
This object can be used to generate configuration files for the compilation step
from the gate-level to the pulse level description.
These configuration files should be compatible with the
:meth:`~quantify_scheduler.backends.graph_compilation.QuantifyCompiler.compile`
function.
"""
def __init__(self, name: str) -> None:
super().__init__(name=name)
[docs]
self.elements = ManualParameter(
"elements",
initial_value=list(),
vals=validators.Lists(validators.Strings()),
docstring="A list containing the names of all elements that"
" are located on this QuantumDevice.",
instrument=self,
)
[docs]
self.edges = ManualParameter(
"edges",
initial_value=list(),
vals=validators.Lists(validators.Strings()),
docstring="A list containing the names of all the edges which connect the"
" DeviceElements within this QuantumDevice",
instrument=self,
)
[docs]
self.instr_measurement_control = InstrumentRefParameter(
"instr_measurement_control",
docstring="A reference to the measurement control instrument.",
vals=validators.MultiType(validators.Strings(), validators.Enum(None)),
instrument=self,
)
[docs]
self.instr_instrument_coordinator = InstrumentRefParameter(
"instr_instrument_coordinator",
docstring="A reference to the instrument_coordinator instrument.",
vals=validators.MultiType(validators.Strings(), validators.Enum(None)),
instrument=self,
)
[docs]
self.cfg_sched_repetitions = ManualParameter(
"cfg_sched_repetitions",
initial_value=1024,
docstring=(
"The number of times execution of the schedule gets repeated when "
"performing experiments, i.e. used to set the repetitions attribute of "
"the Schedule objects generated."
),
vals=validators.Ints(min_value=1),
instrument=self,
)
[docs]
self.keep_original_schedule = ManualParameter(
"keep_original_schedule",
initial_value=True,
docstring=(
"If `True`, the compiler will not modify the schedule argument. "
"If `False`, the compilation modifies the schedule, thereby "
"making the original schedule unusable for further usage; this "
"improves compilation time. Warning: if `False`, the returned schedule "
"references objects from the original schedule, please refrain from modifying "
"the original schedule after compilation in this case!"
),
vals=validators.Bool(),
instrument=self,
)
[docs]
self.hardware_config: HardwareConfig = HardwareConfig(instrument=self)
"""
The input dictionary used to generate a valid HardwareCompilationConfig using
:meth:`~.generate_hardware_compilation_config`.
This configures the compilation from the quantum-device layer to the control-hardware layer.
Useful methods to write and reload the configuration from a json file are
:meth:`~.HardwareConfig.load_from_json_file` and
:meth:`~.HardwareConfig.write_to_json_file`.
"""
[docs]
self.scheduling_strategy = ManualParameter(
"scheduling_strategy",
docstring="Scheduling strategy used to calculate absolute timing.",
vals=validators.Enum("asap", "alap"),
initial_value="asap",
)
# Store refs to prevent them from being garbage collected.
[docs]
self._instrument_references = {}
def __getstate__(self) -> dict[str, Any]: # type: ignore
"""
Serializes :class:`~QuantumDevice` into a dict containing serialized :class:`~DeviceElement`
and :class:`~Edge` objects plus ``cfg_sched_repetitions``.
"""
data: dict[str, Any] = {"name": self.name}
data["elements"] = {
element_name: json.dumps(self.get_element(element_name), cls=SchedulerJSONEncoder)
for element_name in self.elements()
}
data["edges"] = {
edge_name: json.dumps(self.get_edge(edge_name), cls=SchedulerJSONEncoder)
for edge_name in self.edges()
}
data["cfg_sched_repetitions"] = str(self.cfg_sched_repetitions())
state = {
"deserialization_type": export_python_object_to_path_string(self.__class__),
"data": data,
}
return state
def __setstate__(self, state: dict[str, Any]) -> None:
"""
Deserializes a dict of serialized :class:`~DeviceElement` and :class:`~Edge` objects
into a `QuantumDevice`.
"""
self.__init__(state["data"]["name"])
for element_name, serialized_element in state["data"]["elements"].items():
self._instrument_references[element_name] = json.loads(
serialized_element, cls=SchedulerJSONDecoder
)
self.add_element(self._instrument_references[element_name])
for edge_name, serialized_edge in state["data"]["edges"].items():
self._instrument_references[edge_name] = json.loads(
serialized_edge, cls=SchedulerJSONDecoder
)
self.add_edge(self._instrument_references[edge_name])
self.cfg_sched_repetitions(int(state["data"]["cfg_sched_repetitions"]))
[docs]
def to_json(self) -> str:
"""
Convert the :class:`~QuantumDevice` data structure to a JSON string.
Overrides the base mixin method to perform additional checks.
Returns
-------
:
The json string containing the serialized `QuantumDevice`.
"""
# Check whether there are closed instruments that prevent serialization.
device_instruments = []
if hasattr(self, "elements"):
device_instruments += self.elements()
if hasattr(self, "edges"):
device_instruments += self.edges()
if not device_instruments:
raise RuntimeError(
f"Cannot serialize '{self.name}'. All attached instruments have been "
f"closed and their information cannot be retrieved any longer."
)
closed_instruments = []
for device_name in device_instruments:
try:
Instrument.find_instrument(device_name)
except KeyError:
closed_instruments.append(device_name)
if closed_instruments:
raise RuntimeError(
f"Cannot serialize '{self.name}'. Instruments '{closed_instruments}' have "
f"been closed and their information cannot be retrieved any longer. "
f"If you do not wish to include these in the "
f"serialization, please remove using `QuantumDevice.remove_element` or "
f"`QuantumDevice.remove_edge`."
)
# Let the JSON mixin handle serialization.
return super().to_json()
[docs]
def generate_compilation_config(self) -> SerialCompilationConfig:
"""Generate a config for use with a :class:`~.graph_compilation.QuantifyCompiler`."""
return SerialCompilationConfig(
name="QuantumDevice-generated SerialCompilationConfig",
keep_original_schedule=self.keep_original_schedule(),
device_compilation_config=self.generate_device_config(),
hardware_compilation_config=self.generate_hardware_compilation_config(),
)
[docs]
def generate_hardware_config(self) -> dict[str, Any]:
"""
Generate a valid hardware configuration describing the quantum device.
Returns
-------
The hardware configuration file used for compiling from the quantum-device
layer to a hardware backend.
.. warning:
The config currently has to be specified by the user using the
:code:`hardware_config` parameter.
"""
return self.hardware_config()
[docs]
def generate_device_config(self) -> DeviceCompilationConfig:
"""
Generate a device config.
This config is used to compile from the quantum-circuit to the
quantum-device layer.
"""
clocks = {}
elements_cfg = {}
edges_cfg = {}
# iterate over the elements on the device
for element_name in self.elements():
element = self.get_element(element_name)
element_cfg = element.generate_device_config()
clocks.update(element_cfg.clocks)
elements_cfg.update(element_cfg.elements)
# iterate over the edges on the device
for edge_name in self.edges():
edge = self.get_edge(edge_name)
edge_cfg = edge.generate_edge_config()
edges_cfg.update(edge_cfg)
device_config = DeviceCompilationConfig(
elements=elements_cfg,
clocks=clocks,
edges=edges_cfg,
scheduling_strategy=self.scheduling_strategy(),
)
return device_config
[docs]
def generate_hardware_compilation_config(self) -> HardwareCompilationConfig | None:
"""
Generate a hardware compilation config.
The compilation config is used to compile from the quantum-device to the
control-hardware layer.
"""
hardware_config = self.hardware_config()
if hardware_config is None:
return None
elif isinstance(hardware_config, HardwareCompilationConfig):
# Hardware config is already a valid HardwareCompilationConfig DataStructure
return hardware_config
elif not any(
[
key in hardware_config
for key in [
"config_type",
"hardware_description",
"hardware_options",
"connectivity",
]
]
):
# Legacy support for the old hardware config dict:
if (
hardware_config["backend"]
== "quantify_scheduler.backends.qblox_backend.hardware_compile"
):
hardware_compilation_config = QbloxHardwareCompilationConfig.model_validate(
hardware_config
)
elif (
hardware_config["backend"]
== "quantify_scheduler.backends.zhinst_backend.compile_backend"
):
compilation_passes = [
SimpleNodeConfig(
name="zhinst_compile_backend",
compilation_func=hardware_config["backend"],
),
]
hardware_compilation_config = HardwareCompilationConfig(
hardware_description={},
hardware_options=HardwareOptions(),
connectivity=hardware_config,
compilation_passes=compilation_passes,
)
else:
compilation_passes = [
SimpleNodeConfig(
name="custom_hardware_backend",
compilation_func=hardware_config["backend"],
),
]
hardware_compilation_config = HardwareCompilationConfig(
hardware_description={},
hardware_options=HardwareOptions(),
connectivity=hardware_config,
compilation_passes=compilation_passes,
)
else:
# Parse a (backend-specific) HardwareCompilationConfig
if "backend" in hardware_config:
raise ValueError(
f"`{HardwareCompilationConfig.__name__}` no longer takes a"
f" 'backend' field; instead, specify the 'config_type', which should"
" contain a string reference to the backend-specific datastructure"
" that should be parsed."
)
hardware_compilation_config_model = hardware_config["config_type"]
if isinstance(hardware_compilation_config_model, str):
hardware_compilation_config_model = import_python_object_from_string(
hardware_compilation_config_model
)
hardware_compilation_config = hardware_compilation_config_model.model_validate(
hardware_config
)
return hardware_compilation_config
[docs]
def get_element(self, name: str) -> DeviceElement:
"""
Return a :class:`~quantify_scheduler.device_under_test.device_element.DeviceElement`
by name.
Parameters
----------
name
The element name.
Returns
-------
:
The element.
Raises
------
KeyError
If key ``name`` is not present in `self.elements`.
"""
if name in self.elements():
return self.find_instrument(name) # type: ignore
raise KeyError(f"'{name}' is not an element of {self.name}.")
[docs]
def add_element(
self,
element: DeviceElement,
) -> None:
"""
Add an element to the elements collection.
Parameters
----------
element
The element to add.
Raises
------
ValueError
If a element with a duplicated name is added to the collection.
TypeError
If :code:`element` is not an instance of the base element.
"""
if element.name in self.elements():
raise ValueError(f"'{element.name}' has already been added.")
if not isinstance(element, DeviceElement):
raise TypeError(f"{repr(element)} is not a DeviceElement.")
self.elements().append(element.name) # list gets updated in place
self._instrument_references[element.name] = element
[docs]
def remove_element(self, name: str) -> None:
"""
Removes an element by name.
Parameters
----------
name
The element name.
"""
self.elements().remove(name) # list gets updated in place
[docs]
def get_edge(self, name: str) -> Instrument:
"""
Returns an edge by name.
Parameters
----------
name
The edge name.
Returns
-------
:
The edge.
Raises
------
KeyError
If key ``name`` is not present in ``self.edges``.
"""
if name in self.edges():
return self.find_instrument(name)
raise KeyError(f"'{name}' is not an edge of {self.name}.")
[docs]
def add_edge(self, edge: Edge) -> None:
"""
Add the edges.
Parameters
----------
edge
The edge name connecting the elements. Has to follow the convention
'element_0'-'element_1'
"""
if edge.name in self.edges():
raise ValueError(f"'{edge.name}' has already been added.")
if not isinstance(edge, Edge):
raise TypeError(f"{repr(edge)} is not an Edge.")
self.edges().append(edge.name)
self._instrument_references[edge.name] = edge
[docs]
def remove_edge(self, edge_name: str) -> None:
"""
Remove an edge by name.
Parameters
----------
edge_name
The edge name.
"""
self.edges().remove(edge_name) # list gets updated in place
