Protocols for coupler calibration

[andrea-pasquale]

In this PR I am porting the former chevron_couplers protocol, i.e. a chevron-like pulse sequence where we sweep the amplitude of the flux pulse sent to the coupler while the qubit are interacting. I'm currently testing/debugging with the emulator.

[codecov]

Codecov Report

❌ Patch coverage is 98.68421% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 97.83%. Comparing base (ea5ef46) to head (5302498).
⚠️ Report is 631 commits behind head on main.

Files with missing lines	Patch %	Lines
src/qibocal/protocols/couplers/readout.py	97.89%	2 Missing ⚠️
...rotocols/two_qubit_interaction/amplitude_tuning.py	98.50%	1 Missing ⚠️
.../two_qubit_interaction/chevron/chevron_couplers.py	97.82%	1 Missing ⚠️
...l/protocols/two_qubit_interaction/chevron/utils.py	92.85%	1 Missing ⚠️
...otocols/two_qubit_interaction/phase_calibration.py	98.36%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1160      +/-   ##
==========================================
+ Coverage   97.81%   97.83%   +0.01%     
==========================================
  Files         131      138       +7     
  Lines       10045    10493     +448     
==========================================
+ Hits         9826    10266     +440     
- Misses        219      227       +8     

Flag	Coverage Δ
unittests	97.83% <98.68%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/qibocal/calibration/calibration.py	98.58% <100.00%> (+0.04%)	⬆️
src/qibocal/protocols/__init__.py	100.00% <100.00%> (ø)
src/qibocal/protocols/couplers/__init__.py	100.00% <100.00%> (ø)
src/qibocal/protocols/couplers/spectroscopy.py	100.00% <100.00%> (ø)
...ibocal/protocols/two_qubit_interaction/__init__.py	100.00% <100.00%> (ø)
...rotocols/two_qubit_interaction/chevron/__init__.py	100.00% <100.00%> (ø)
...protocols/two_qubit_interaction/chevron/chevron.py	97.67% <100.00%> (-1.54%)	⬇️
...ls/two_qubit_interaction/chevron/chevron_signal.py	100.00% <100.00%> (ø)
...two_qubit_interaction/chevron/coupler_amplitude.py	100.00% <100.00%> (ø)
...rotocols/two_qubit_interaction/amplitude_tuning.py	98.50% <98.50%> (ø)
... and 4 more

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[andrea-pasquale]

The protocol to sweep the amplitude of the flux pulse played on the coupler channel seems to work fine: http://login.qrccluster.com:9000/cclKxN4nSf-NOiN51pxGwg==/
As soon as we add a post-processing to extract the amplitude where the coupling between the qubit is maximum we should be able to review and merge.

[andrea-pasquale]

@sorewachigauyo I've added the acquisition for the protocol that you showed in #1197. I'm getting meaningful results on the emulator.
The results from the coupler_amplitude (which corresponds to protocol 1 from #1197) is the following

while with the amplitude_tuning (which corresponds to protocol 2a from #1197) I get this

and finally from the phase_calibration (which corresponds to protocol 2b from #1197) I am getting this

Feel free to test the code on your setup whenever you have time.

[andrea-pasquale]

I've now added a protocol to do also a coupler spectroscopy (similar to what we had in #277). Here are the results with the emulator

(Fitting is still missing)