Skip to main contentIBM Quantum Documentation
This page is from an old version of Qiskit SDK and does not exist in the latest version. We recommend you migrate to the latest version. See the release notes for more information.
Important

IBM Quantum Platform is moving and this version will be sunset on July 1. To get started on the new platform, read the migration guide.

Constant

class Constant(duration, amp, name=None)

GitHub

A simple constant pulse, with an amplitude value and a duration:

f(x)=amp,0<=x<durationf(x)=0,elsewheref(x) = amp , 0 <= x < duration f(x) = 0 , elsewhere

Initialize the constant-valued pulse.

Parameters

  • duration (int) – Pulse length in terms of the the sampling period dt.
  • amp (complex) – The amplitude of the constant square pulse.
  • name (Optional[str]) – Display name for this pulse envelope.

Attributes

amp

Type: complex

The constant value amplitude.

Return type

complex

id

Type: int

Unique identifier for this pulse.

Return type

int

parameters

Type: Dict[str, Any]

Return a dictionary containing the pulse’s parameters.

Return type

Dict[str, Any]


Methods

__call__

Constant.__call__(channel)

Call self as a function.

draw

Constant.draw(dt=1, style=None, filename=None, interp_method=None, scale=1, interactive=False, scaling=None)

Plot the pulse.

Parameters

  • dt (float) – Time interval of samples.
  • style (Optional[PulseStyle]) – A style sheet to configure plot appearance
  • filename (Optional[str]) – Name required to save pulse image
  • interp_method (Optional[Callable]) – A function for interpolation
  • scale (float) – Relative visual scaling of waveform amplitudes
  • interactive (bool) – When set true show the circuit in a new window (this depends on the matplotlib backend being used supporting this)
  • scaling (Optional[float]) – Deprecated, see scale

Returns

A matplotlib figure object of the pulse envelope

Return type

matplotlib.figure

get_sample_pulse

Constant.get_sample_pulse()

Return a SamplePulse with samples filled according to the formula that the pulse represents and the parameter values it contains.

Return type

SamplePulse

validate_parameters

Constant.validate_parameters()

Validate parameters.

Raises

PulseError – If the parameters passed are not valid.

Return type

None

Was this page helpful?
Report a bug or request content on GitHub.