Drag

class qiskit.pulse.library.Drag(duration, amp, sigma, beta, angle=0.0, name=None, limit_amplitude=None)

Bases: object

The Derivative Removal by Adiabatic Gate (DRAG) pulse is a standard Gaussian pulse with an additional Gaussian derivative component and lifting applied.

It can be calibrated either to reduce the phase error due to virtual population of the $|2\rangle$ state during the pulse or to reduce the frequency spectrum of a standard Gaussian pulse near the $|1\rangle\leftrightarrow|2\rangle$ transition, reducing the chance of leakage to the $|2\rangle$ state.

\begin{aligned} g(x) &= \exp\Bigl(-\frac12 \frac{(x - \text{duration}/2)^2}{\text{sigma}^2}\Bigr)\\ g'(x) &= \text{A}\times\frac{g(x)-g(-1)}{1-g(-1)}\\ f(x) &= g'(x) \times \Bigl(1 + 1j \times \text{beta} \times \Bigl(-\frac{x - \text{duration}/2}{\text{sigma}^2}\Bigr) \Bigr), \quad 0 \le x < \text{duration} \end{aligned}

where $g(x)$ is a standard unlifted Gaussian waveform, $g'(x)$ is the lifted Gaussian waveform, and $\text{A} = \text{amp} \times \exp\left(i\times\text{angle}\right)$ .

References

Deprecated since version 1.3

The class qiskit.pulse.library.symbolic_pulses.Drag is deprecated as of Qiskit 1.3. It will be removed in Qiskit 2.0. The entire Qiskit Pulse package is being deprecated and will be moved to the Qiskit Dynamics repository: https://github.com/qiskit-community/qiskit-dynamics

Attributes

alias

Valeur par défaut: 'Drag'

Cette page a-t-elle été utile ?

Signaler un bogue, une coquille ou proposer du contenu sur GitHub.