https://www.universetoday.com/163959/a-new-superconducting-camera-can-resolve-single-photons/
Researchers have built a superconducting camera with 400,000 pixels, which is so sensitive it can detect single photons. It comprises a grid of superconducting wires with no resistance until a photon strikes one or more wires. This shuts down the superconduct…
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