Readout and device maps

The signal chain a qubit is read out through, and the two-dimensional gate or bias maps that characterize a device before it is used: charge stability, conductance, switching probability, and the mixer and amplifier behavior that sets how much of that signal survives to the digitizer.

Double-dot charge stability diagram

Double-dot charge stability diagram

Tunneling spectroscopy of a Majorana device

Tunneling spectroscopy of a Majorana device

Reflectance contrast vs gate voltage

Reflectance contrast vs gate voltage

SQUID switching-current probability vs flux

SQUID switching-current probability vs flux

Single-shot readout fidelity optimization

Single-shot readout fidelity optimization

Active reset calibration: residual excitation vs rounds and pulse amplitude

Active reset calibration: residual excitation vs rounds and pulse amplitude

Single-shot readout IQ blob histogram

Single-shot readout IQ blob histogram

IQ mixer calibration: nulling LO leakage

IQ mixer calibration: nulling LO leakage

Measurement-induced state transitions vs readout power and duration

Measurement-induced state transitions vs readout power and duration

IQ mixer calibration: suppressing the image sideband

IQ mixer calibration: suppressing the image sideband

Josephson parametric amplifier: gain versus pump power and bandwidth

Josephson parametric amplifier: gain versus pump power and bandwidth