Readout optimization

Qibocal provides a protocol to improve the readout pulse amplitude by optimize the assignment fidelity.

Parameters

class qibocal.protocols.readout_optimization.resonator_amplitude.ResonatorAmplitudeParameters(amplitude_step: float, amplitude_start: float = 0.0, amplitude_stop: float = 1.0, error_threshold: float = 0.003)

ResonatorAmplitude runcard inputs.

amplitude_step: float

Amplituude step to be probed.

amplitude_start: float = 0.0

Amplitude start.

amplitude_stop: float = 1.0

Amplitude stop value

error_threshold: float = 0.003

Probability error threshold to stop the best amplitude search

hardware_average: bool = False

By default hardware average will be performed.

nshots: int

Number of executions on hardware.

relaxation_time: float

Wait time for the qubit to decohere back to the gnd state.

Example

It follows an example runcard of the resonator amplitude routine with the plot generated in the report.

- id: resonator_amplitude
  operation: resonator_amplitude
  parameters:
      amplitude_step: 0.0005
      amplitude_start: 0.001
      amplitude_stop: 0.005

As shown in the picture below, the protocol sweeps the readout amplitude and evaluates the probability errors