CMOS Camera Detects Entangled Photons in Image Plane
Analysis
This paper presents a significant advancement in quantum imaging by demonstrating the detection of spatially entangled photon pairs using a standard CMOS camera operating at mesoscopic intensity levels. This overcomes the limitations of previous photon-counting methods, which require extremely low dark rates and operate in the photon-sparse regime. The ability to use standard imaging hardware and work at higher photon fluxes makes quantum imaging more accessible and efficient.
Key Takeaways
- •Demonstrates detection of spatially entangled photon pairs using a standard CMOS camera.
- •Operates at mesoscopic intensity levels, significantly higher photon flux than photon-counting methods.
- •Achieves image- and pupil plane correlation measurements.
- •Employs a tailored correlation analysis to suppress detector artifacts and intensity fluctuations.
- •Extends quantum imaging techniques beyond the photon-counting regime.
Reference
“From the measured image- and pupil plane correlations, we observe position and momentum correlations consistent with an EPR-type entanglement witness.”