operation

Module containing the core concepts of the scheduler.

Module Contents

Classes

Operation

A representation of quantum circuit operations.

Attributes

cached_locate

cached_locate

class Operation(name: str)

Bases: quantify_scheduler.json_utils.JSONSchemaValMixin, collections.UserDict

A representation of quantum circuit operations.

The Operation class is a JSON-compatible data structure that contains information on how to represent the operation on the quantum-circuit and/or the quantum-device layer. It also contains information on where the operation should be applied: the Resource s used.

An operation always has the following attributes:

• duration (float): duration of the operation in seconds (can be 0).

• hash (str): an auto generated unique identifier.

• name (str): a readable identifier, does not have to be unique.

An Operation can contain information on several levels of abstraction. This information is used when different representations are required. Note that when initializing an operation not all of this information needs to be available as operations are typically modified during the compilation steps.

Tip

quantify_scheduler comes with a gate_library and a pulse_library , both containing common operations.

JSON schema of a valid Operation

JSON schema for a quantify sequencer operation.
type	object
properties
name	type	string
gate_info	type	object
	properties
	unitary	A unitary matrix describing the operation.
	operation_type	Defines what class of operations this gate refers to (e.g. Rxy, CZ etc.).
		type	string
	qubits	A list of strings indicating the qubits the gate acts on. Valid qubits are strings that appear in the device_config.json file.
		type	array
	symmetric	A boolean to indicate whether a two qubit gate is symmetric. This is used in the device config compilation stage. By default, it is set as False
		type	boolean
	tex	latex snippet for plotting
		type	string
	plot_func	reference to a function for plotting this operation. If not specified, defaults to using gate_box().
		type	string / null
	additionalProperties	True
pulse_info	A list containing the pulses that are part of the operation
	type	array
	items	Info to generate an individual pulse.
		type	object
		properties
		port	A string specifying the port used by the pulse.
			type	string / null
		clock	A string specifying the clock used to modulate the pulse.
			type	string
		wf_func	reference to a function to generate the pulse of this operation.
			type	string / null
		t0	Starting time of the pulse with respect to the start of the operation in seconds.
			type	number
		duration	The duration of the pulse in seconds.
			type	number
acquisition_info	A list containing the acquisitions that are part of the operation
	type	array
	items	Info to generate an individual acquisition.
		type	object
		properties
		port	A string specifying the port used by the acquisition.
			type	string
		clock	A string specifying the clock used to demodulate the acquisition.
			type	string
		t0	Starting time of the pulse with respect to the start of the operation in seconds.
			type	number
		duration	The duration of the acquisition in seconds.
			type	number
		acq_channel	The acquisition channel to use.
			type	number
		acq_index	The acquisition index where to store the result of the acquisition protocol.
			type	number
		acq_return_type	Describes the return type of an acquisition performed using this protocol.
		additionalProperties	True
logic_info	Not Implemented.
additionalProperties	False

Note

Two different Operations containing the same information generate the same hash and are considered identical.

schema_filename = 'operation.json'

_class_signature = None

_duration: float = 0

_update() → None

Update the Operation’s internals.

property name: str

Return the name of the operation.

property duration: float

Determine operation duration from pulse_info.

If the operation contains no pulse info, it is assumed to be ideal and have zero duration.

property hash: str

A hash based on the contents of the Operation.

Needs to be a str for easy compatibility with json.

classmethod _get_signature(parameters: dict) → str

Returns the constructor call signature of this instance for serialization.

The string constructor representation can be used to recreate the object using eval(signature).

Parameters:

parameters (dict) – The current data dictionary.

add_gate_info(gate_operation: Operation) → None

Updates self.data[‘gate_info’] with contents of gate_operation.

Parameters:

gate_operation – an operation containing gate_info.

add_device_representation(device_operation: Operation) → None

Adds device-level representation details to the current operation.

Parameters:

device_operation – an operation containing the pulse_info and/or acquisition info describing how to represent the current operation at the quantum-device layer.

add_pulse(pulse_operation: Operation) → None

Adds pulse_info of pulse_operation Operation to this Operation.

Parameters:

pulse_operation – an operation containing pulse_info.

add_acquisition(acquisition_operation: Operation) → None

Adds acquisition_info of acquisition_operation Operation to this Operation.

Parameters:

acquisition_operation – an operation containing acquisition_info.

get_used_port_clocks() → set[tuple[str, str]]

Extracts which port-clock combinations are used in this operation.

Returns:

All (port, clock) combinations this operation uses.

classmethod is_valid(object_to_be_validated: Operation) → bool

Validates the object’s contents against the schema.

Additionally, checks if the hash property of the object evaluates correctly.

property valid_gate: bool

An operation is a valid gate if it has gate-level representation details.

property valid_pulse: bool

An operation is a valid pulse if it has pulse-level representation details.

property valid_acquisition: bool

An operation is a valid acquisition if it has pulse-level acquisition representation details.

property is_conditional_acquisition: bool

An operation is conditional if one of the following holds, self is an an acquisition with a feedback_trigger_label assigned to it.

property is_control_flow: bool

Determine if operation is a control flow operation.

Returns:

Whether the operation is a control flow operation.

Return type:

bool

property has_voltage_offset: bool

Checks if the operation contains information for a voltage offset.