`quantify_scheduler.schedules.schedule`

Module containing the core concepts of the scheduler.

Module Contents

Classes

`ScheduleBase`	The `ScheduleBase` is a data structure that is at
`Schedule`	A modifiable schedule.
`Schedulable`	This class represents an element on a schedule. All elements on a schedule are
`CompiledSchedule`	A schedule that contains compiled instructions ready for execution using
`AcquisitionMetadata`	Class to provide a description of the shape and type of data that a schedule will

class ScheduleBase(dict=None, /, **kwargs)[source]

Bases: quantify_scheduler.json_utils.JSONSchemaValMixin, collections.UserDict, abc.ABC

The ScheduleBase is a data structure that is at the core of the Quantify-scheduler and describes when what operations are applied where.

The ScheduleBase is a collection of quantify_scheduler.operations.operation.Operation objects and timing constraints that define relations between the operations.

The schedule data structure is based on a dictionary. This dictionary contains:

operation_dict - a hash table containing the unique
quantify_scheduler.operations.operation.Operation s added to the schedule.
schedulables - a dictionary of all timing constraints added
between operations.

The Schedule provides an API to create schedules. The CompiledSchedule represents a schedule after it has been compiled for execution on a backend.

The Schedule contains information on the operations and schedulables. The operations is a dictionary of all unique operations used in the schedule and contain the information on what operation to apply where. The schedulables is a dictionary of Schedulables describing timing constraints between operations, i.e. when to apply an operation.

JSON schema of a valid Schedule

JSON schema for a quantify schedule.
type	object
properties
name	Name of the schedule.
	type	string
repetitions	The amount of times the schedule will be repeated.
	type	integer
	default	1
schedulables	A dictionary containing schedulables.
	type	object
operation_dict	A dictionary of operations. Keys correspond to the hash attribute of operations.
	type	object
resource_dict	A dictionary of resources.
	type	object
compiled_instructions	A containing compiled instructions.
	type	object
additionalProperties	False

property name: str[source]: Returns the name of the schedule.

property repetitions: int[source]

Returns the amount of times this Schedule will be repeated.

Returns: The repetitions count.

property operations: Dict[str, quantify_scheduler.operations.operation.Operation][source]

A dictionary of all unique operations used in the schedule. This specifies information on what operation to apply where.

The keys correspond to the hash and values are instances of quantify_scheduler.operations.operation.Operation.

property schedulables: Dict[str, Any][source]

A list of schedulables describing the timing of operations.

A schedulable uses timing constraints to constrain the operation in time by specifying the time ("rel_time") between a reference operation and the added operation. The time can be specified with respect to a reference point ("ref_pt"') on the reference operation (:code:”ref_op”) and a reference point on the next added operation (:code:”ref_pt_new”’). A reference point can be either the “start”, “center”, or “end” of an operation. The reference operation ("ref_op") is specified using its label property.

Each item in the list represents a timing constraint and is a dictionary with the following keys:

['label', 'rel_time', 'ref_op', 'ref_pt_new', 'ref_pt', 'operation_repr']

The label is used as a unique identifier that can be used as a reference for other operations, the operation_repr refers to the string representation of a operation in operations.

Note

timing constraints are not intended to be modified directly. Instead use the add()

property resources: Dict[str, quantify_scheduler.resources.Resource][source]: A dictionary containing resources. Keys are names (str), values are instances of Resource.

property timing_table: pandas.io.formats.style.Styler[source]

A styled pandas dataframe containing the absolute timing of pulses and acquisitions in a schedule.

This table is constructed based on the abs_time key in the schedulables. This requires the timing to have been determined.

Parameters: schedule – a schedule for which the absolute timing has been determined.
Returns: styled_timing_table, a pandas Styler containing a dataframe with an overview of the timing of the pulses and acquisitions present in the schedule. The data frame can be accessed through the .data attribute of the Styler.
Raises: ValueError – When the absolute timing has not been determined during compilation.

to_json() → str[source]

Converts the Schedule data structure to a JSON string.

Returns: The json string result.

classmethod from_json(data: str) → Schedule[source]

Converts the JSON data to a Schedule.

Parameters: data – The JSON data.
Returns: The Schedule object.

plot_circuit_diagram(figsize: Tuple[int, int] = None, ax: Optional[matplotlib.axes.Axes] = None, plot_backend: Literal[mpl] = 'mpl') → Tuple[matplotlib.figure.Figure, Union[matplotlib.axes.Axes, List[matplotlib.axes.Axes]]][source]

Creates a circuit diagram visualization of the schedule using the specified plotting backend.

The circuit diagram visualization depicts the schedule at the quantum circuit layer. Because quantify-scheduler uses a hybrid gate-pulse paradigm, operations for which no information is specified at the gate level are visualized using an icon (e.g., a stylized wavy pulse) depending on the information specified at the quantum device layer.

Alias of quantify_scheduler.schedules._visualization.circuit_diagram.circuit_diagram_matplotlib().

Parameters

schedule – the schedule to render.
figsize – matplotlib figsize.
ax – Axis handle to use for plotting.
plot_backend – Plotting backend to use, currently only ‘mpl’ is supported

Returns

fig – matplotlib figure object.
ax – matplotlib axis object.

Each gate, pulse, measurement, and any other operation are plotted in the order of execution, but no timing information is provided.

Example

from quantify_scheduler import Schedule
from quantify_scheduler.operations.gate_library import Reset, X90, CZ, Rxy, Measure

sched = Schedule(f"Bell experiment on q0-q1")

sched.add(Reset("q0", "q1"))
sched.add(X90("q0"))
sched.add(X90("q1"), ref_pt="start", rel_time=0)
sched.add(CZ(qC="q0", qT="q1"))
sched.add(Rxy(theta=45, phi=0, qubit="q0") )
sched.add(Measure("q0", acq_index=0))
sched.add(Measure("q1", acq_index=0), ref_pt="start")

sched.plot_circuit_diagram();

Note

Gates that are started simultaneously on the same qubit will overlap.

from quantify_scheduler import Schedule
from quantify_scheduler.operations.gate_library import X90, Measure

sched = Schedule(f"overlapping gates")

sched.add(X90("q0"))
sched.add(Measure("q0"), ref_pt="start", rel_time=0)
sched.plot_circuit_diagram();

Note

If the pulse’s port address was not found then the pulse will be plotted on the ‘other’ timeline.

plot_pulse_diagram(port_list: Optional[List[str]] = None, sampling_rate: float = 1000000000.0, modulation: Literal[off, if, clock] = 'off', modulation_if: float = 0.0, plot_backend: Literal[mpl, plotly] = 'mpl', plot_kwargs: Optional[dict] = None) → Union[Tuple[matplotlib.figure.Figure, matplotlib.axes.Axes], plotly.graph_objects.Figure][source]

Creates a visualization of all the pulses in a schedule using the specified plotting backend.

The pulse diagram visualizes the schedule at the quantum device layer. For this visualization to work, all operations need to have the information present (e.g., pulse info) to represent these on the quantum-circuit level and requires the absolute timing to have been determined. This information is typically added when the quantum-device level compilation is performed.

Alias of quantify_scheduler.schedules._visualization.pulse_diagram.pulse_diagram_matplotlib() and quantify_scheduler.schedules._visualization.pulse_diagram.pulse_diagram_plotly().

port_list :: A list of ports to show. if set to None will use the first 8 ports it encounters in the sequence.
modulation :: Determines if modulation is included in the visualization.
modulation_if :: Modulation frequency used when modulation is set to “if”.
sampling_rate :: The time resolution used to sample the schedule in Hz.
plot_backend:: Plotting library to use, can either be ‘mpl’ or ‘plotly’.
plot_kwargs:: Dictionary of keyword arguments to pass to the plotting backend

Returns: the plot
Return type: Union[Tuple[Figure, Axes], plotly.graph_objects.Figure]

Example

from quantify_scheduler.operations.pulse_library import SquarePulse, RampPulse
from quantify_scheduler.compilation import determine_absolute_timing

schedule = Schedule("waveforms")
schedule.add(SquarePulse(amp=0.2, duration=4e-6, port="P"))
schedule.add(RampPulse(amp=-0.1, offset=.2, duration=6e-6, port="P"))
schedule.add(SquarePulse(amp=0.1, duration=4e-6, port="Q"), ref_pt='start')
determine_absolute_timing(schedule)

_ = schedule.plot_pulse_diagram(sampling_rate=20e6)

get_schedule_duration()[source]

Method to find the duration of the schedule.

Returns: schedule_duration – Duration of current schedule
Return type: float

class Schedule(name: str, repetitions: int = 1, data: dict = None)[source]

Bases: ScheduleBase

A modifiable schedule.

Operations quantify_scheduler.operations.operation.Operation can be added using the add() method, allowing precise specification when to perform an operation using timing constraints.

When adding an operation, it is not required to specify how to represent this quantify_scheduler.operations.operation.Operation on all layers. Instead, this information can be added later during compilation. This allows the user to effortlessly mix the gate- and pulse-level descriptions as required for many (calibration) experiments.

Initialize a new instance of Schedule.

Parameters

name – The name of the schedule
repetitions – The amount of times the schedule will be repeated, by default 1
data – A dictionary containing a pre-existing schedule, by default None

schema_filename = 'schedule.json'[source]

add_resources(resources_list: list) → None[source]: Add wrapper for adding multiple resources

add_resource(resource) → None[source]: Add a resource such as a channel or qubit to the schedule.

add(operation: quantify_scheduler.operations.operation.Operation, rel_time: float = 0, ref_op: Schedulable | str | None = None, ref_pt: Literal[start, center, end] = 'end', ref_pt_new: Literal[start, center, end] = 'start', label: str = None) → Schedulable[source]

Add an quantify_scheduler.operations.operation.Operation to the schedule.

Parameters

operation – The operation to add to the schedule
rel_time – relative time between the reference operation and the added operation. the time is the time between the “ref_pt” in the reference operation and “ref_pt_new” of the operation that is added.
ref_op – reference schedulable. If set to None, will default to the last added operation.
ref_pt – reference point in reference operation must be one of (‘start’, ‘center’, ‘end’).
ref_pt_new – reference point in added operation must be one of (‘start’, ‘center’, ‘end’).
label – a unique string that can be used as an identifier when adding operations. if set to None, a random hash will be generated instead.

Returns

returns the schedulable created on the schedule

class Schedulable(name, operation_repr, schedule, data: dict = None)[source]

Bases: quantify_scheduler.json_utils.JSONSchemaValMixin, collections.UserDict

This class represents an element on a schedule. All elements on a schedule are schedulables. A schedulable contains all information regarding the timing of this element as well as the operation being executed by this element. This operation is currently represented by an operation ID.

Schedulables can contain an arbitrary number of timing constraints to determine the timing. Multiple different constraints are currently resolved by delaying the element until after all timing constraints have been met, to aid compatibility. To specify an exact timing between two schedulables, please ensure to only specify exactly one timing constraint.

Parameters

name – The name of this schedulable, by which it can be referenced by other schedulables. Separate schedulables cannot share the same name
operation_repr – The operation which is to be executed by this schedulable
schedule – The schedule to which the schedulable is added. This allows schedulable to find other elements on the schedule

schema_filename = 'schedulable.json'[source]

add_timing_constraint(rel_time: float = 0, ref_schedulable: Schedulable | str | None = None, ref_pt: Literal[start, center, end] = 'end', ref_pt_new: Literal[start, center, end] = 'start')[source]

A timing constraint constrains the operation in time by specifying the time ("rel_time") between a reference schedulable and the added schedulable. The time can be specified with respect to the “start”, “center”, or “end” of the operations. The reference schedulable ("ref_schedulable") is specified using its name property. See also schedulables.

Parameters

rel_time – relative time between the reference schedulable and the added schedulable. the time is the time between the “ref_pt” in the reference operation and “ref_pt_new” of the operation that is added.
ref_schedulable – name of the reference schedulable. If set to None, will default to the last added operation.
ref_pt – reference point in reference schedulable must be one of (‘start’, ‘center’, ‘end’).
ref_pt_new – reference point in added schedulable must be one of (‘start’, ‘center’, ‘end’).

class CompiledSchedule(schedule: Schedule)[source]

Bases: ScheduleBase

A schedule that contains compiled instructions ready for execution using the InstrumentCoordinator.

The CompiledSchedule differs from a Schedule in that it is considered immutable (no new operations or resources can be added), and that it contains compiled_instructions.

Tip

A CompiledSchedule can be obtained by compiling a Schedule using compile().

property compiled_instructions: Dict[str, quantify_scheduler.resources.Resource][source]

A dictionary containing compiled instructions.

The contents of this dictionary depend on the backend it was compiled for. However, we assume that the general format consists of a dictionary in which the keys are instrument names corresponding to components added to a InstrumentCoordinator, and the values are the instructions for that component.

These values typically contain a combination of sequence files, waveform definitions, and parameters to configure on the instrument.

property hardware_timing_table: pandas.io.formats.style.Styler[source]

Returns a timing table representing all operations at the Control-hardware layer.

Note that this timing table is typically different from the .timing_table in that it contains more hardware specific information such as channels, clock cycles and samples and corrections for things such as gain.

This hardware timing table is intended to provide a more

This table is constructed based on the timing_table and modified during compilation in one of the hardware back ends and optionally added to the schedule. Not all back ends support this feature.

property hardware_waveform_dict: Dict[str, numpy.ndarray][source]

Returns a waveform dictionary representing all waveforms at the Control-hardware layer.

Where the waveforms are represented as abstract waveforms in the Operations, this dictionary contains the numerical arrays that are uploaded to the hardware.

This dictionary is constructed during compilation in the hardware back ends and: optionally added to the schedule. Not all back ends support this feature.

schema_filename = 'schedule.json'[source]

classmethod is_valid(object_to_be_validated) → bool[source]: Checks if the contents of the object_to_be_validated are valid according to the schema. Additionally checks if the object_to_be_validated is an instance of CompiledSchedule

class AcquisitionMetadata[source]

Class to provide a description of the shape and type of data that a schedule will return when executed.

Note

The acquisition protocol, bin-mode and return types are assumed to be the same for all acquisitions in a schedule.

acq_protocol: str[source]: The acquisition protocol that is used for all acquisitions in the schedule.

bin_mode: quantify_scheduler.enums.BinMode[source]: How the data is stored in the bins indexed by acq_channel and acq_index.

acq_return_type: Type[source]: The datatype returned by the individual acquisitions.

acq_indices: Dict[int, List[int]][source]: A dictionary containing the acquisition channel as key and a list of acquisition indices that are used for every channel.

repetitions: int[source]: How many times the acquisition was repeated on this specific sequencer.

quantify_scheduler.schedules.schedule

Module Contents

Classes

`quantify_scheduler.schedules.schedule`