Quantum imaging with undetected photons


Researchers used a quantum entanglement camera to image a cat etched on a piece of silicon. Photons that interact with the silicon are not used to form the image directly. The photons are entangled to other photons in a different wavelength, and these are detected to form the image instead (article available at nature.com).

In other words, the image is obtained by detecting only photons that never interact with the silicon. There are two images above (dark and light cat) because the camera relies on destructive and constructive quantum interference, producing both a positive and negative image.

Read the digested news story at spectrum.ieee.org

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