Teams from Glasgow University and two French based organisations, Paris Institute of Nanosciences and Kastler Brossel lab, worked together to combat a long running challenge presented by quantum entanglement.
Entanglement enables two particles to maintain close connection, regardless of distance but difficulty in detecting it makes it hard to harness this for advanced microscopes and communications systems.
In their paper in the journal Physical Review X Quantum, the joint teams described how they developed an optical manipulation technique to preserve entanglement between photons travelling through challenging conditions.
Pairs of entangled photons were sent through a scattering layer, a process that normally causes random scattering that leaves entanglement undetectable. But, acting on the particles before they enter the layer, the researchers were able to compensate for the disturbance and restore entanglement at the output.
Corresponding author Dr Hugo Defienne of the Paris Institute and Glasgow University said: “It’s a little bit like turning omelettes back into eggs, and it’s the first time that it’s been done in quantum technologies.
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