Fixing rabi issue when fitting fails

[andrea-pasquale]

Closes #758

Checklist:

• Reviewers confirm new code works as expected.
• Tests are passing.
• Coverage does not decrease.
• Documentation is updated.
• Compatibility with Qibo modules (Please edit this section if the current pull request is not compatible with the following branches).
  • Qibo: master
  • Qibolab: main
  • Qibolab_platforms_qrc: main

[rodolfocarobene]

Tested it, it fails gracefully now :-)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.20%. Comparing base (c171ad9) to head (d40958a).
Report is 10 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #759      +/-   ##
==========================================
- Coverage   97.23%   97.20%   -0.03%     
==========================================
  Files         102      102              
  Lines        7297     7296       -1     
==========================================
- Hits         7095     7092       -3     
- Misses        202      204       +2     

Flag	Coverage Δ
unittests	97.20% <100.00%> (-0.03%)	⬇️

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

Files	Coverage Δ
.../protocols/characterization/coherence/spin_echo.py	100.00% <100.00%> (ø)
...qibocal/protocols/characterization/coherence/t1.py	100.00% <100.00%> (ø)
...qibocal/protocols/characterization/coherence/t2.py	100.00% <100.00%> (ø)
...ocal/protocols/characterization/coherence/utils.py	96.29% <100.00%> (+0.21%)	⬆️
...bocal/protocols/characterization/coherence/zeno.py	100.00% <100.00%> (ø)
...rotocols/characterization/qubit_spectroscopy_ef.py	98.48% <100.00%> (-0.03%)	⬇️
...bocal/protocols/characterization/rabi/amplitude.py	97.61% <100.00%> (+0.02%)	⬆️

... and 1 file with indirect coverage changes

[rodolfocarobene]

However I think that also T1 may have a similar problem...
Let me finish testing all the routines and I will come back to you (I'm testing without being connected to anything so they fail immediately)

[rodolfocarobene]

for T1 I got:

[Qibocal 0.0.8|INFO|2024-03-20 14:23:46]: Finished acquisition in less than 1 second.
/home/rodolfo/Venv/qibo/lib/python3.11/site-packages/scipy/optimize/_minpack_py.py:94
5: RuntimeWarning: divide by zero encountered in divide
  transform = 1.0 / sigma
[Qibocal 0.0.8|WARNING|2024-03-20 14:23:46]: Exponential decay fit failed for qubit 0
 due to Residuals are not finite in the initial point.
Traceback (most recent call last):
  File "/home/rodolfo/Venv/qibo/bin/qq", line 8, in <module>
    sys.exit(command())
             ^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/lib/python3.11/site-packages/click/core.py", line 115
7, in __call__
    return self.main(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/lib/python3.11/site-packages/click/core.py", line 107
8, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/lib/python3.11/site-packages/click/core.py", line 168
8, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/lib/python3.11/site-packages/click/core.py", line 143
4, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/lib/python3.11/site-packages/click/core.py", line 783
, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/qibocal/src/qibocal/cli/_base.py", line 72, in auto
    autocalibrate(runcard, folder, force, update)
  File "/home/rodolfo/Venv/qibo/qibocal/src/qibocal/cli/autocalibration.py", line 56,
 in autocalibrate
    for _ in executor.run(mode=ExecutionMode.autocalibration):
  File "/home/rodolfo/Venv/qibo/qibocal/src/qibocal/auto/execute.py", line 69, in run
    completed = task.run(
                ^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/qibocal/src/qibocal/auto/task.py", line 112, in run
    completed.results, completed.results_time = operation.fit(completed.data)
                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/qibocal/src/qibocal/auto/operation.py", line 41, in w
rapper
    out = func(*args, **kwds)
          ^^^^^^^^^^^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/qibocal/src/qibocal/protocols/characterization/cohere
nce/t1.py", line 136, in _fit
    chi2 = {
           ^
  File "/home/rodolfo/Venv/qibo/qibocal/src/qibocal/protocols/characterization/cohere
nce/t1.py", line 140, in <dictcomp>
    utils.exp_decay(data[qubit].wait, *fitted_parameters[qubit]),
                                       ~~~~~~~~~~~~~~~~~^^^^^^^
KeyError: 0

Then I got an error for ramsey_sequences (that does not exist anymore), so we should update the example runcard.

All other routines worked as expected

[andrea-pasquale]

for T1 I got:

[Qibocal 0.0.8|INFO|2024-03-20 14:23:46]: Finished acquisition in less than 1 second.
/home/rodolfo/Venv/qibo/lib/python3.11/site-packages/scipy/optimize/_minpack_py.py:94
5: RuntimeWarning: divide by zero encountered in divide
  transform = 1.0 / sigma
[Qibocal 0.0.8|WARNING|2024-03-20 14:23:46]: Exponential decay fit failed for qubit 0
 due to Residuals are not finite in the initial point.
Traceback (most recent call last):
  File "/home/rodolfo/Venv/qibo/bin/qq", line 8, in <module>
    sys.exit(command())
             ^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/lib/python3.11/site-packages/click/core.py", line 115
7, in __call__
    return self.main(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/lib/python3.11/site-packages/click/core.py", line 107
8, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/lib/python3.11/site-packages/click/core.py", line 168
8, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/lib/python3.11/site-packages/click/core.py", line 143
4, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/lib/python3.11/site-packages/click/core.py", line 783
, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/qibocal/src/qibocal/cli/_base.py", line 72, in auto
    autocalibrate(runcard, folder, force, update)
  File "/home/rodolfo/Venv/qibo/qibocal/src/qibocal/cli/autocalibration.py", line 56,
 in autocalibrate
    for _ in executor.run(mode=ExecutionMode.autocalibration):
  File "/home/rodolfo/Venv/qibo/qibocal/src/qibocal/auto/execute.py", line 69, in run
    completed = task.run(
                ^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/qibocal/src/qibocal/auto/task.py", line 112, in run
    completed.results, completed.results_time = operation.fit(completed.data)
                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/qibocal/src/qibocal/auto/operation.py", line 41, in w
rapper
    out = func(*args, **kwds)
          ^^^^^^^^^^^^^^^^^^^
  File "/home/rodolfo/Venv/qibo/qibocal/src/qibocal/protocols/characterization/cohere
nce/t1.py", line 136, in _fit
    chi2 = {
           ^
  File "/home/rodolfo/Venv/qibo/qibocal/src/qibocal/protocols/characterization/cohere
nce/t1.py", line 140, in <dictcomp>
    utils.exp_decay(data[qubit].wait, *fitted_parameters[qubit]),
                                       ~~~~~~~~~~~~~~~~~^^^^^^^
KeyError: 0

Then I got an error for ramsey_sequences (that does not exist anymore), so we should update the example runcard.

All other routines worked as expected

Also T2, SpinEcho and Zeno had the same issues. Try now.