Qubit Zoo

Measuring weak microwave signals via a current-biased Josephson junction: Suppressing its thermal noise via fast bias current sweeps

1 min read

This follow-up theory study proposed fast nonadiabatic bias-current sweeps to suppress thermal-noise sensitivity in a current-biased Josephson-junction threshold detector and numerically reach single-microwave-photon sensitivity.

Key Results

  • Distinguished equilibrium and nonequilibrium detector operation by bias-sweep rate
  • Predicted reduced thermal-noise sensitivity under rapid nonadiabatic sweeps
  • Estimated single-photon sensitivity, dynamic range, bandwidth, and photon-number resolution for a broadband threshold detector

Graph View

Backlinks