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.

FixedFrequencyTransmon

class FixedFrequencyTransmon(basis_gates=None, default_values=None, link_parameters=True)[source]

A library of gates for fixed-frequency superconducting qubit architectures.

Note that for now this library supports single-qubit gates and will be extended in the future.

Provided gates:

  • x: \(\pi\) pulse around the x-axis.

  • sx: \(\pi/2\) pulse around the x-axis.

  • y: \(\pi\) pulse around the y-axis.

  • sy: \(\pi/2\) pulse around the y-axis.

Pulse parameters:

  • duration: Duration of the pulses Default value: 160 samples.

  • σ: Standard deviation of the pulses Default value: duration / 4.

  • β: DRAG parameter of the pulses Default value: 0.

  • amp: Magnitude of the complex amplitude of the pulses. If the parameters are linked then x and y share the same parameter and sx and sy share the same parameter. Default value: 50% of the maximum output for x and y and 25% of the maximum output for sx and sy. Note that the user provided default amplitude in the __init__ method sets the default amplitude of the x and y pulses. The amplitude of the sx and sy pulses is half the provided value.

  • angle: The phase of the complex amplitude of the pulses.

Parameters without schedule:

  • meas_freq: frequency of the measurement drives.

  • drive_freq: frequency of the qubit drives.

Note that the β and amp parameters may be linked between the x and y as well as between the sx and sy pulses. All pulses share the same duration and σ parameters.

Setup the schedules.

Parameters:

  • basis_gates (List[str] | None) – The basis gates to generate.

  • default_values (Dict | None) – Default values for the parameters this dictionary can contain the following keys: “duration”, “amp”, “β”, and “σ”. If “σ” is not provided this library will take one fourth of the pulse duration as default value.

  • link_parameters (bool) – If set to True, then the amplitude and DRAG parameters of the \(X\) and \(Y\) gates will be linked as well as those of the \(SX\) and \(SY\) gates.

Attributes

basis_gates

Return the basis gates supported by the library.

Methods

__getitem__(name)

Return the schedule.

Return type:

ScheduleBlock

__len__()

The length of the library defined as the number of basis gates.

config()

Return the settings used to initialize the library.

Return type:

Dict[str, Any]

default_values()[source]

Return the default values for the parameters.

Returns

A list of tuples is returned. These tuples are structured so that instances of Calibrations can call Calibrations.add_parameter_value() on the tuples.

Return type:

List[DefaultCalValue]

classmethod from_config(config)

Deserialize the library given the input dictionary

Return type:

BasisGateLibrary

get(k[, d]) → D[k] if k in D, else d.  d defaults to None.
items() → a set-like object providing a view on D's items
keys() → a set-like object providing a view on D's keys
num_qubits(name)

Return the number of qubits that the schedule with the given name acts on.

Return type:

int

values() → an object providing a view on D's values