qiskit.pulse.library.Cos#

qiskit.pulse.library.Cos(duration, amp, phase, freq=None, angle=0.0, name=None, limit_amplitude=None)[código fonte]#

A cosine pulse.

The envelope of the pulse is given by:

\[f(x) = \text{A}\cos\left(2\pi\text{freq}x+\text{phase}\right) , 0 <= x < duration\]

where \(\text{A} = \text{amp} \times\exp\left(i\times\text{angle}\right)\).

Parâmetros:

duration (int | ParameterExpression) – Pulse length in terms of the sampling period dt.
amp (float | ParameterExpression) – The magnitude of the amplitude of the cosine wave. Wave range is [-amp,`amp`].
phase (float | ParameterExpression) – The phase of the cosine wave (note that this is not equivalent to the angle of the complex amplitude).
freq (ParameterExpression | float | None) – The frequency of the cosine wave, in terms of 1 over sampling period. If not provided defaults to a single cycle (i.e :math:”frac{1}{text{duration}}”). The frequency is limited to the range \(\left(0,0.5\right]\) (the Nyquist frequency).
angle (ParameterExpression | float | None) – The angle in radians of the complex phase factor uniformly scaling the pulse. Default value 0.
name (str | None) – Display name for this pulse envelope.
limit_amplitude (bool | None) – If True, then limit the amplitude of the waveform to 1. The default is True and the amplitude is constrained to 1.

Retorno:

ScalableSymbolicPulse instance.

Tipo de retorno: