Quantum noise ? A limit in photodetection

Martin Wilkens, Maciej Lewenstein, Jan Grochmalicki

Gerard J Milburn

Ferran Martin Ciurana, Giorgio Colangelo, R. J. Sewell +1 more

We demonstrate high-efficiency, shot-noise-limited differential photodetection with real-time signal conditioning, suitable for feedback-based quantum control of atomic systems. The detector system has quantum efficiency of 0.92, is shot-noise-limited from 7.4×105 to 3.7×108 photons per pulse, and provides real-time voltage-encoded output at up to 2.3 M pulses per second.

Josue Davila-Rodriguez, John D. Teufel, José Aumentado +4 more

We perform microwave generation via high-speed photodetection at a temperature of 20 mK. Shot noise-limited detection with high linearity was obtained, compatible with continued scaling of the control and readout of superconducting quantum information systems.

A. Arnéodo, F. Rocca

Josue Davila-Rodriguez, John D. Teufel, José Aumentado +4 more

We perform microwave generation via high-speed photodetection at a temperature of 20 mK. Shot noise-limited detection with high linearity was obtained, compatible with continued scaling of the control and readout of superconducting quantum information systems.© 2019 The Author(s)