Note

This is the documentation for the current state of the development branch of Qiskit Experiments. The documentation or APIs here can change prior to being released.

FineFrequencyCal¶

class FineFrequencyCal(physical_qubits, calibrations, backend=None, cal_parameter_name='drive_freq', delay_duration=None, repetitions=None, auto_update=True, gate_name='sx')[source]¶

A calibration version of the fine frequency experiment.

Analysis class reference

ErrorAmplificationAnalysis

Experiment options

These options can be set by the set_experiment_options() method.

Options

Defined in the class FineFrequencyCal:
- dt (float)
  
  Default value: None
  
  The duration of the time unit dt of the delay and schedules in seconds.
Defined in the class BaseCalibrationExperiment:
- result_index (int)
  
  Default value: -1
  
  The index of the result from which to update the calibrations.
- group (str)
  
  Default value: "default"
  
  The calibration group to which the parameter belongs. This will default to the value “default”.
Defined in the class FineFrequency:
- repetitions (List[int])
  
  Default value: [0, 1, 2, 3, 4, …]
  
  A list of the number of times that the delay is repeated.
- delay_duration (int)
  
  Default value: None
  
  The duration of the delay as the number of dt s it contains. The total length of the delay in units of dt will be n times delay_duration where n also determines the rotation angle of the RZGate by \(n \pi/2\).
Defined in the class BaseExperiment:
- max_circuits (Optional[int])
  
  Default value: None
  
  The maximum number of circuits per job when running an experiment on a backend.

See also

Initialization

See class FineFrequency for details.

Note that this class implicitly assumes that the target angle of the gate is \(\pi/2\) as seen from the default analysis options. This experiment can be seen as a calibration of a finite duration rz(pi/2) gate with any error attributed to a frequency offset in the qubit.

Parameters:

physical_qubits (Sequence[int]) – Sequence containing the qubit for which to run the fine frequency calibration.
calibrations (Calibrations) – The calibrations instance with the schedules.
backend (Backend | None) – Optional, the backend to run the experiment on.
cal_parameter_name (str | None) – The name of the parameter to update in the calibrations. This defaults to drive_freq.
delay_duration (int | None) – The duration of the delay at \(n=1\). If this value is not given then the duration of the gate named gate_name in the calibrations will be used.
auto_update (bool) – Whether to automatically update the calibrations or not. By default, this variable is set to True.
gate_name (str) – This argument is only needed if delay_duration is None. This should be the name of a valid schedule in the calibrations.

Attributes

analysis¶: Return the analysis instance for the experiment.

Note

Analysis instance set to calibration experiment is implicitly patched to run calibration updater to update the parameters in the calibration table.

backend¶: Return the backend for the experiment

calibrations¶: Return the calibrations.

experiment_options¶: Return the options for the experiment.

experiment_type¶: Return experiment type.

num_qubits¶: Return the number of qubits for the experiment.

physical_qubits¶: Return the device qubits for the experiment.

run_options¶: Return options values for the experiment run() method.

transpile_options¶: Return the transpiler options for the run() method.

Methods

circuits()¶

Return the list of quantum circuits to run.

Return type:: List[QuantumCircuit]

config()¶

Return the config dataclass for this experiment

Return type:: ExperimentConfig

copy()¶

Return a copy of the experiment

Return type:: BaseExperiment

classmethod from_config(config)¶

Initialize an experiment from experiment config

Return type:: BaseExperiment

job_info(backend=None)¶

Get information about job distribution for the experiment on a specific backend.

Parameters:

backend (Backend) – Optional, the backend for which to get job distribution information. If not specified, the experiment must already have a set backend.

Returns:

A dictionary containing information about job distribution.

”Total number of circuits in the experiment”: Total number of circuits in the experiment.

”Maximum number of circuits per job”: Maximum number of circuits in one job based on backend and experiment settings.

”Total number of jobs”: Number of jobs needed to run this experiment on the currently set backend.

Return type:

dict

Raises:

QiskitError – if backend is not specified.

run(backend=None, analysis='default', timeout=None, **run_options)¶

Run an experiment and perform analysis.

Parameters:

backend (Backend | None) – Optional, the backend to run the experiment on. This will override any currently set backends for the single execution.
analysis (BaseAnalysis | None) – Optional, a custom analysis instance to use for performing analysis. If None analysis will not be run. If "default" the experiments analysis() instance will be used if it contains one.
timeout (float | None) – Time to wait for experiment jobs to finish running before cancelling.
run_options – backend runtime options used for circuit execution.

Returns:

The experiment data object.

Raises:

QiskitError – If experiment is run with an incompatible existing ExperimentData container.

Return type:

ExperimentData

set_experiment_options(**fields)¶

Set the experiment options.

Parameters:: fields – The fields to update the options
Raises:: AttributeError – If the field passed in is not a supported options

set_run_options(**fields)¶

Set options values for the experiment run() method.

Parameters:: fields – The fields to update the options