laboneq_applications.experiments.time_traces

This module defines the raw-traces measurement.

In this measurement, raw traces are acquired for qubits in different states in order to compute the optimal integration kernels for qubit readout, which allow to maximally distinguish between the qubit states (typically, g, e, f).

The raw-traces measurement has the following pulse sequence

qb --- [prepare state] --- [measure]

The corresponding traces are acquired for all combinations of the qubits and states given by the user.

TimeTracesExperimentOptions

Options for the time-traces experiment.

This class is needed to change the default value of acquisition_type compared with the value in BaseExperimentOptions.

Attributes:

Name	Type	Description
acquisition_type	str | AcquisitionType	Acquisition type to use for the experiment. Default: AcquisitionType.RAW.

acquisition_type: str | AcquisitionType = workflow.option_field(AcquisitionType.RAW, description='Acquisition type to use for the experiment') class-attribute instance-attribute

create_experiment(qpu, qubit, state, options=None)

Creates a raw-traces Experiment.

Parameters:

Name	Type	Description	Default
qpu	QPU	The qpu consisting of the original qubits and quantum operations.	required
qubit	QuantumElement	The qubit for which to create the Experiment.	required
state	Literal['g', 'e', 'f']	The state in which to prepare the qubit. Must be 'g', 'e' or 'f'.	required
options	TimeTracesExperimentOptions | None	The options for building the experiment as an instance of [TimeTracesExperimentOptions]. See the docstring of this class for more details.	None

Returns:

Name	Type	Description
experiment	Experiment	The generated LabOne Q experiment instance to be compiled and executed.

Raises:

Type	Description
ValueError	If the state is not 'g', 'e' or 'f'.
ValueError	If options.acquisition_type is not AcquisitionType.RAW or "raw".

Example

options = TimeTracesExperimentOptions()
options.count(10)
qpu = QPU(
    qubits=[TunableTransmonQubit("q0"), TunableTransmonQubit("q1")],
    quantum_operations=TunableTransmonOperations(),
)
temp_qubits = qpu.copy_qubits()
create_experiment(
    qpu=qpu,
    qubits=temp_qubits,
    states="gef"
    options=options,
)

experiment_workflow(session, qpu, qubits, states, temporary_parameters=None, options=None)

The raw-traces experiment workflow.

The workflow consists of the following tasks:

• validate_and_convert_qubits_sweeps
• with for_(qubits) as qubit:
  • create_experiment
  • compile_experiment
  • run_experiment
  • append_result
• combine_results
• analysis_workflow
• update_qubits

Parameters:

Name	Type	Description	Default
session	Session	The connected session to use for running the experiment.	required
qpu	QPU	The qpu consisting of the original qubits and quantum operations.	required
qubits	Qubits	The qubits to run the experiments on. May be either a single qubit or a list of qubits.	required
states	Sequence[Literal['g', 'e', 'f']]	The qubit states for which to acquire the raw traces. Must be a list of strings containing g, e or f.	required
temporary_parameters	dict[str, dict | TransmonParameters] | None	The temporary parameters to update the qubits with.	None
options	TuneUpWorkflowOptions | None	The options for building the workflow as an instance of [TuneUpWorkflowOptions]. See the docstring of this class for more details.	None

Returns:

Name	Type	Description
WorkflowBuilder	None	The builder for the experiment workflow.

Example

options = experiment_workflow.options()
options.create_experiment.count(10)
qpu = QPU(
    qubits=[TunableTransmonQubit("q0"), TunableTransmonQubit("q1")],
    quantum_operations=TunableTransmonOperations(),
)
temp_qubits = qpu.copy_qubits()
result = experiment_workflow(
    session=session,
    qpu=qpu,
    qubit=temp_qubits[0],
    states="gef",
    options=options,
).run()