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

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.

5 pages, 4 figures

References in corpus (14)

• Quantum teleportation between light and matter
• Real-time quantum feedback prepares and stabilizes photon number states
• Mesoscopic atomic entanglement for precision measurements beyond the standard quantum limit
• Quantum-enhanced optical phase tracking
• Spin squeezing of a cold atomic ensemble with the nuclear spin of one-half
• An ultra-sensitive pulsed balanced homodyne detector: Application to time-domain quantum measurements
• Quantum control and measurement of atomic spins in polarization spectroscopy
• Generation of macroscopic singlet states in a cold atomic ensemble
• Unconditional quantum-noise suppression via measurement-based quantum feedback
• Generation of macroscopic singlet states in atomic ensembles
• Certified quantum non-demolition measurement of a macroscopic material system
• Feedback-cooling of an atomic spin ensemble
• Ultra--low noise differential AC-coupled photodetector for sensitive pulse detection applications
• Fast polarimetry system for the application to spin quantum non-demolition measurement

Cited by in corpus (6)

• Simultaneous tracking of spin angle and amplitude beyond classical limits
• Bose-Einstein Condensate Comagnetometer
• Entanglement-enhanced phase estimation without prior phase information
• Multi-second magnetic coherence in a single domain spinor Bose-Einstein condensate
• Cavity-enhanced polarization rotation measurements for low-disturbance probing of atoms
• Interferometric measurement of interhyperfine scattering lengths in ${}^{87}$Rb