229 lines
5.5 KiB
Plaintext
229 lines
5.5 KiB
Plaintext
---
|
||
title: RabiFitter
|
||
description: API reference for qiskit.ignis.characterization.RabiFitter
|
||
in_page_toc_min_heading_level: 1
|
||
python_api_type: class
|
||
python_api_name: qiskit.ignis.characterization.RabiFitter
|
||
---
|
||
|
||
# RabiFitter
|
||
|
||
<Class id="qiskit.ignis.characterization.RabiFitter" isDedicatedPage={true} github="https://github.com/qiskit-community/qiskit-ignis/tree/stable/0.7/qiskit/ignis/characterization/calibrations/fitters.py" signature="RabiFitter(backend_result, xdata, qubits, fit_p0, fit_bounds=None)" modifiers="class">
|
||
Bases: `qiskit.ignis.characterization.fitters.IQFitter`
|
||
|
||
Rabi Experiment fitter
|
||
|
||
See BaseCalibrationFitter \_\_init\_\_
|
||
|
||
fit\_po is \[amp, freq, phase, offset]
|
||
|
||
## Methods
|
||
|
||
### add\_data
|
||
|
||
<Function id="qiskit.ignis.characterization.RabiFitter.add_data" signature="RabiFitter.add_data(results, recalc=True, refit=True)">
|
||
Add new execution results to previous execution results
|
||
|
||
**Parameters**
|
||
|
||
* **results** (`Union`\[`Result`, `List`\[`Result`]]) – new execution results
|
||
* **recalc** (`bool`) – whether tp recalculate the data
|
||
* **refit** (`bool`) – whether to refit the data
|
||
</Function>
|
||
|
||
### fit\_data
|
||
|
||
<Function id="qiskit.ignis.characterization.RabiFitter.fit_data" signature="RabiFitter.fit_data(qid=- 1, p0=None, bounds=None, series=None)">
|
||
Fit the curve.
|
||
|
||
Compute self.\_params and self.\_params\_err
|
||
|
||
**Parameters**
|
||
|
||
* **qid** (`int`) – qubit for fitting. If -1 fit for all the qubits
|
||
* **p0** (`Optional`\[`List`\[`float`]]) – initial guess, equivalent to p0 in scipy.optimize
|
||
* **bounds** (`Optional`\[`Tuple`\[`List`\[`float`], `List`\[`float`]]]) – bounds, equivalent to bounds in scipy.optimize
|
||
* **series** (`Optional`\[`str`]) – series to fit (if None fit all)
|
||
</Function>
|
||
|
||
### guess\_params
|
||
|
||
<Function id="qiskit.ignis.characterization.RabiFitter.guess_params" signature="RabiFitter.guess_params(qind=0)">
|
||
Guess fit parameters for rabi oscillation data
|
||
|
||
**Parameters**
|
||
|
||
**qind** (*int*) – qubit index to guess fit parameters for
|
||
|
||
**Returns**
|
||
|
||
**List of fit guess parameters**
|
||
|
||
\[amp, freq, phase, offset]
|
||
|
||
**Return type**
|
||
|
||
list
|
||
</Function>
|
||
|
||
### pi2\_amplitude
|
||
|
||
<Function id="qiskit.ignis.characterization.RabiFitter.pi2_amplitude" signature="RabiFitter.pi2_amplitude(qind=- 1)">
|
||
Return the pi/2 amplitude from the fit
|
||
|
||
**Parameters**
|
||
|
||
**qind** (*int*) – qubit index
|
||
|
||
**Returns**
|
||
|
||
$\frac{\pi}{2}$ amp
|
||
|
||
**Return type**
|
||
|
||
float
|
||
</Function>
|
||
|
||
### pi\_amplitude
|
||
|
||
<Function id="qiskit.ignis.characterization.RabiFitter.pi_amplitude" signature="RabiFitter.pi_amplitude(qind=- 1)">
|
||
Return the pi amplitude from the fit
|
||
|
||
**Parameters**
|
||
|
||
**qind** (*int*) – qubit index
|
||
|
||
**Returns**
|
||
|
||
$\pi$ amp
|
||
|
||
**Return type**
|
||
|
||
float
|
||
</Function>
|
||
|
||
### plot
|
||
|
||
<Function id="qiskit.ignis.characterization.RabiFitter.plot" signature="RabiFitter.plot(qind, series='0', ax=None, show_plot=False)">
|
||
Plot the data and fit
|
||
|
||
**Parameters**
|
||
|
||
* **qind** (*int*) – qubit index
|
||
* **series** (*str*) – data series to plot (for rabi data always ‘0’)
|
||
* **ax** (*Axes*) – matploblib axes (if none created)
|
||
* **show\_plot** (*bool*) – do plot.show
|
||
|
||
**Returns**
|
||
|
||
Plot axes
|
||
|
||
**Return type**
|
||
|
||
Axes
|
||
</Function>
|
||
|
||
## Attributes
|
||
|
||
### backend\_result
|
||
|
||
<Attribute id="qiskit.ignis.characterization.RabiFitter.backend_result">
|
||
Return the execution results
|
||
|
||
**Return type**
|
||
|
||
`Union`\[`Result`, `List`\[`Result`]]
|
||
</Attribute>
|
||
|
||
### description
|
||
|
||
<Attribute id="qiskit.ignis.characterization.RabiFitter.description">
|
||
Return the fitter’s purpose, e.g. ‘T1’
|
||
|
||
**Return type**
|
||
|
||
`str`
|
||
</Attribute>
|
||
|
||
### fit\_fun
|
||
|
||
<Attribute id="qiskit.ignis.characterization.RabiFitter.fit_fun">
|
||
Return the function used in the fit, e.g. BaseFitter.\_exp\_fit\_fun
|
||
|
||
**Return type**
|
||
|
||
`Callable`
|
||
</Attribute>
|
||
|
||
### measured\_qubits
|
||
|
||
<Attribute id="qiskit.ignis.characterization.RabiFitter.measured_qubits">
|
||
Return the indices of the qubits to be characterized
|
||
|
||
**Return type**
|
||
|
||
`List`\[`int`]
|
||
</Attribute>
|
||
|
||
### params
|
||
|
||
<Attribute id="qiskit.ignis.characterization.RabiFitter.params">
|
||
Return the fit function parameters that were calculated by curve\_fit
|
||
|
||
**Return type**
|
||
|
||
`List`\[`float`]
|
||
</Attribute>
|
||
|
||
### params\_err
|
||
|
||
<Attribute id="qiskit.ignis.characterization.RabiFitter.params_err">
|
||
Return the error of the fit function parameters
|
||
|
||
**Return type**
|
||
|
||
`List`\[`float`]
|
||
</Attribute>
|
||
|
||
### series
|
||
|
||
<Attribute id="qiskit.ignis.characterization.RabiFitter.series">
|
||
Return the list of series for the data
|
||
|
||
**Return type**
|
||
|
||
`Optional`\[`List`\[`str`]]
|
||
</Attribute>
|
||
|
||
### xdata
|
||
|
||
<Attribute id="qiskit.ignis.characterization.RabiFitter.xdata">
|
||
Return the data points on the x-axis, the independenet parameter which is fit against
|
||
|
||
**Return type**
|
||
|
||
`Union`\[`List`\[`float`], `array`]
|
||
</Attribute>
|
||
|
||
### ydata
|
||
|
||
<Attribute id="qiskit.ignis.characterization.RabiFitter.ydata">
|
||
Return the data points on the y-axis
|
||
|
||
The data points are returning in the form of a list of dictionaries:
|
||
|
||
> * **ydata\[i]\[‘mean’] is a list, where item**
|
||
>
|
||
> no. j is the probability of success of qubit i for a circuit that lasts xdata\[j].
|
||
>
|
||
> * **ydata\[i]\[‘std’] is a list, where ydata\[‘std’]\[j] is the**
|
||
>
|
||
> standard deviation of the success of qubit i.
|
||
|
||
**Return type**
|
||
|
||
`List`\[`Dict`]
|
||
</Attribute>
|
||
</Class>
|
||
|