All in a spin: Two indistinguishable photons (red lines) are incident on a beamsplitter cube and become entangled. The two photons are then coupled into an optical fibre-based interferometer, which is ...

A team of researchers led by Philip Walther at the University of Vienna carried out a pioneering experiment where they measured the effect of the rotation of Earth on quantum entangled photons. The ...

Schematic of the Michelson–Sagnac interferometer used in the cooling experiment. Laser light enters from the left and is split into two beams that make their way round a triangular path and create an ...