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class Constant(duration: Union[int, qiskit.circuit.parameterexpression.ParameterExpression], amp: Union[complex, float, qiskit.circuit.parameterexpression.ParameterExpression], angle: Optional[Union[float, qiskit.circuit.parameterexpression.ParameterExpression]] = None, name: Optional[str] = None, limit_amplitude: Optional[bool] = None)

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Bases: object

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

f(x)=amp×exp(iangle),0<=x<durationf(x)=0,elsewheref(x) = \text{amp}\times\exp\left(i\text{angle}\right) , 0 <= x < duration f(x) = 0 , elsewhere

Create new pulse instance.


  • duration – Pulse length in terms of the sampling period dt.
  • amp – The magnitude of the amplitude of the square envelope. Complex amp support will be deprecated.
  • angle – The angle of the complex amplitude of the square envelope. Default value 0.
  • name – Display name for this pulse envelope.
  • limit_amplitude – If True, then limit the amplitude of the waveform to 1. The default is True and the amplitude is constrained to 1.


ScalableSymbolicPulse instance.



Default value: 'Constant'

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