Real-time shot-noise-limited differential photodetection for atomic quantum control

TL;DR

This paper presents a high-efficiency, shot-noise-limited differential photodetector capable of real-time signal processing, enabling advanced feedback control in atomic quantum systems with high speed and precision.

Contribution

The work introduces a photodetector with 0.92 quantum efficiency, shot-noise-limited performance over a wide photon range, and real-time output at 2.3 million pulses per second for quantum control.

Findings

Quantum efficiency of 0.92 achieved.

Shot-noise-limited detection over broad photon range.

Real-time processing at 2.3 Mpulses/sec.

Abstract

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 x 10^5 to 3.7 x 10^8 photons per pulse, and provides real-time voltage-encoded output at up to 2.3 Mpulses per second.