Ramsey ZZ protocol

[andrea-pasquale]

Protocol to compute ZZ strength between two qubits.
Some preliminary results available here http://login.qrccluster.com:9000/qwQY9gVKRyiA14v2HEhMuw==/
They confirm that ZZ seems to be an issue at least for qw11q

Example runcard:

actions:

  - id: ramsey
    operation: ramsey_zz
    targets: [2]
    parameters:
      delay_between_pulses_start: 10
      delay_between_pulses_end: 2_000
      delay_between_pulses_step: 50
      detuning: 500_000
      target_qubit: 3
      nshots: 1024

• Simplify code and remove duplication

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

[codecov]

Codecov Report

Attention: Patch coverage is 76.97842% with 32 lines in your changes missing coverage. Please review.

Project coverage is 97.21%. Comparing base (c4fdce8) to head (18ceaee).

Files	Patch %	Lines
src/qibocal/protocols/ramsey/ramsey_zz.py	76.29%	32 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #970      +/-   ##
==========================================
- Coverage   97.50%   97.21%   -0.29%     
==========================================
  Files         123      124       +1     
  Lines        9701     9840     +139     
==========================================
+ Hits         9459     9566     +107     
- Misses        242      274      +32     

Flag	Coverage Δ
unittests	97.21% <76.97%> (-0.29%)	⬇️

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

Files	Coverage Δ
src/qibocal/protocols/__init__.py	100.00% <100.00%> (ø)
src/qibocal/protocols/ramsey/utils.py	100.00% <100.00%> (ø)
src/qibocal/protocols/ramsey/ramsey_zz.py	76.29% <76.29%> (ø)

[alecandido]

I guess this is just a mistake (it's just the value above repeated)