Emulator readout module modification

[dexonoir]

->Integrated emulator readout module into pulse_simulator, to have readout resonator system, which handles multiple resonators with variable noise models

->Modified demodulation procedure, incorporated dressed frequency, described relationship between bare resonator frequency with dispersive shifted (qubit-state dependent) resonator frequency

• Equations describing relationship between bare resonator frequency and dispersive shifted resonator frequency are backed up using raw data

• Homodyne/heterodyne demodulation was used, with the motivation of removing time-dependent component from readout data, to inspect on the phase response of resonator which shall be maximized when resonator is probed just in-between two qubit-state dependent resonance frequencies

• Provided additional descriptions, improved performance of the readout setup (dispersive effect, SNR effect)

[alecandido]

Just a first shallow review

[jykhoo1987]

@stavros11 @alecandido May I know if this PR is planned to be merged into qibolab 0.1 main? As I understood, no further PRs for 0.1 main will be accepted except for those that are critical/bug fixes. In that regard, the 1q_emulator_upgrades branch is quite ahead of the main branch for emulator-related features. So may I suggest that this PR be pushed first to 1q_emulator_upgrades branch, and then if the plan is to merge to 0.1 main, then we can merge 1q_emulator_upgrades branch to main after that.

[alecandido]

As you said, 0.1 should be considered not to accept any longer features, but just bug fixes, since the development has been moved to 0.2.

I'd suggest to keep developing this here, since we may need some more structured effort for the upgrade.
So, yes, ideally there should be just one PR with the emulator, that will later be ported to 0.2. This won't be that PR, but regarding the how to reconcile #942 and #985 I have no strong preference (and I personally do not consider a solution urgent - but I may be wrong).

P.S.: to avoid confusion, https://github.com/qiboteam/qibolab/tree/main is 0.2, but there is a https://github.com/qiboteam/qibolab/tree/0.1 branch, so 0.1 with no further specification may well be used to refer to that branch (without any further specifier, as in "0.1 main"). If you want to point to a release, use the full release number, or just 0.1.x to refer to the series.