Achieving high-fidelity and large-dynamic-range quantum photon-number resolution

https://phys.org/news/2024-02-quantum-precision-superconducting-photon-accuracy.html

"Superconducting nanostrip single-photon detectors (SNSPDs) resolving fidelity, and dynamic range... increasing strip width (to μm scale) or total inductance overcame bandwidth limitations and readout timing jitter stretching rising edges and improving signal-to-noise ratio... true-photon-number resolution up to 10 without use of cryogenic amplifiers... readout fidelity re 98% for 4-photon... reduced data acquisition requirements 3 orders magnitude... unbiased, robust against noise, resistant to eavesdropping"

Related: A new wavelength of scientific exploration with single-photon detectors
https://phys.org/news/2024-01-wavelength-scientific-exploration-photon-detectors.html