Physicists at the University of Glasgow, Scotland, have produced the first-ever image of a strong form of quantum entanglement, known as Bell entanglement.
To achieve this, they devised a system which fires a stream of entangled photons from a quantum source of light at “non-conventional objects” – which change the phase of the photons as they pass through.
Researchers then set up a super-sensitive camera capable of detecting single photons which would only take an image when it caught sight of both the photon and its entangled ‘twin’, creating a visible record of entanglement.
https://www.theregister.co.uk/2019/07/13/quantum_entanglement_picture/