# Tutorial: qubit calibration

```{toctree}
:titlesonly:
:hidden:

resonator_spectroscopy.md
resonator_spectroscopy_power.md
resonator_spectroscopy_DC_sweep.md
twotone_spectroscopy.md
rabi_amp.md
rabi_time.md
t1.md
ramsey.md
ramsey_echo.md
ramsey_fringes.md
excited_sweep.md
pulsed_twotone_spectroscopy.md
single_shot_readout.md
```

## Tune up a qubit with Presto

Performing all the standard qubit measurements is a good place to start learning how to program the
Presto API. In this tutorial, we begin with a simple resonator spectroscopy using {mod}`.lockin`
mode, and we continue with all the standard pulsed measurements using {mod}`.pulsed` mode. You can
view the complete source code of the example scripts in the [presto-measure
repository][presto-measure]. We recommend you read the examples in order as later measurements
build on previous ones. If you want to skip ahead, be sure to have a look at the first scripts
using each of the lockin and pulsed mode: [Resonator spectroscopy](resonator_spectroscopy) and
[Rabi amplitude](rabi_amp).

Here's a list of the examples in this tutorial with a brief description, click on the headers to
view the related page. These measurements, and a few more, are also published in the [Presto
paper](#presto-paper).

### [Resonator spectroscopy](resonator_spectroscopy.md)

{mod}`.lockin` -- Simple single-frequency sweep of the resonator in continuous wave.

### [Power sweep of resonator](resonator_spectroscopy_power.md)

{mod}`.lockin` -- 2D sweep of drive amplitude and frequency of the resonator.

### [Frequency and DC bias sweep of flux tunable resonator](resonator_spectroscopy_DC_sweep.md)

{mod}`.lockin` -- 2D sweep of DC bias and frequency of the flux tunable resonator.

### [Two-tone spectroscopy of the qubit](twotone_spectroscopy.md)

{mod}`.lockin` -- Two-tone spectroscopy: 2D sweep of qubit drive amplitude and frequency, with
fixed resonator drive frequency and amplitude.

### [Rabi in amplitude](rabi_amp.md)

{mod}`.pulsed` -- Rabi oscillations by driving the qubit with a pulse of variable amplitude and
constant duration. Multiple pulses can be applied to increase the accuracy of fitted results.

### [Rabi time](rabi_time.md)

{mod}`.pulsed` -- 2D sweep where we measure Rabi oscillations by driving the qubit with a square
pulse of variable duration and variable amplitude. Fit the amplitude-dependent Rabi rate. 

### [Relaxation time {math}`T_1`](t1.md)

{mod}`.pulsed` -- Measure the energy-relaxation time $T_1$.

### [Ramsey {math}`T_2^*`](ramsey.md)

{mod}`.pulsed` -- Measure Ramsey oscillations by changing the delay between two $\pi/2$ pulses. Fit
detuning of control frequency from qubit, and the coherence time {math}`T_2^*`.

### [Hahn echo {math}`T_2`](ramsey_echo.md)

{mod}`.pulsed` -- Measure the decoherence time $T_2$ with a Ramsey-echo experiment.

### [Ramsey fringes](ramsey_fringes.md)

{mod}`.pulsed` -- Measure Ramsey fringes by changing the delay between two $\pi/2$ pulses and their
detuning from the qubit frequency.

### [Resonator sweep with the qubit in the excited state](excited_sweep.md)

{mod}`.pulsed` -- Pulsed frequency sweep of the resonator with and without a $\pi$ pulse: plot and
fit resonance curves for ground and excited states, and find the optimal readout frequency.

### [Pulsed two-tone spectroscopy](pulsed_twotone_spectroscopy.md)

{mod}`.pulsed` -- Two-tone spectroscopy: 1D sweep of qubit drive frequency, with fixed amplitude
and fixed resonator drive frequency and amplitude.

<!--- ### AC Stark shift
{mod}`.pulsed` -- Measure AC-Stark shift and measurement-induced dephasing by performing a Ramsey measurement while
driving the resonator with variable power. -->
 
[presto-measure]: https://github.com/intermod-pro/presto-measure
[restools]: https://github.com/sebastianprobst/resonator_tools