Scalable homodyne detection of multimode quantum light using CCD camera technology
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[Submitted on 9 Jun 2026]
Lightly browned and well buttered. A solid pick from the rack.
Summary
Researchers have developed a scalable homodyne detection method for quantum light using CCD camera pixels, enabling shot-noise-limited quadrature measurements of 60 optical modes simultaneously. This approach requires only nanowatt-level local oscillator power per mode—a six-order-of-magnitude reduction compared to conventional methods—while achieving clearance exceeding 24 dB with negligible crosstalk. The system was demonstrated by directly observing squeezing and entanglement in 60 optical modes, verifying multipartite entanglement, and enabling conditional preparation of multimode states, providing a scalable path for large-scale quantum information processing.
Key quotes
· 5 pulledScalability is a key challenge in advancing quantum technologies such as quantum computing, communication, and metrology.
Our approach enables shot-noise-limited quadrature measurements of 60 optical modes simultaneously, while requiring only nanowatt-level local oscillator power per mode -- a six-order-of-magnitude reduction compared to conventional methods.
The system achieves clearance exceeding 24 dB for all modes with negligible crosstalk.
We demonstrate its compatibility with a large-scale quantum state by directly observing squeezing and entanglement in 60 optical modes.
This work provides a scalable method for quantum measurement, paving the way for large-scale quantum information processing.
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