Cz parametrization
Cz parametrization sweeps the frequency and amplitude of the AC flux pulse as well as the DC current that biases the coupler.
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The frequency sweep is done around the \(\left(f_{|11\rangle} - f_{|02\rangle}\right)\) or the \(\left(f_{|11\rangle} - f_{|20\rangle}\right)\) frequency difference.
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The amplitude sweep is done around empirically chosen values.
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The DC current sweep is done around at regions where the coupling anticrossing is expected to mediate population transfer between the two qubits.
The measurement is done with 3 state readout while the three state discriminator had already been found from the ro_ampl_three_state_optimization node.
This measurement displays that for the particular bias current \((460\mu A)\) , a parameter region is observed, where population transfer is mediated by the coupler:
While this measurement shows that for an other DC current value \((420\mu A)\) the qubits remain at the \(|11\rangle\) state throughout the sweep:
