The Isaac Newton Group of Telescopes wishes to congratulate Anton Zeilinger (University of Vienna, Austria), Alain Aspect (Université Paris-Saclay and
École Polytechnique, Palaiseau, France), and John F. Clauser (J.F. Clauser & Assoc., Walnut Creek, CA, USA) who have been awarded the Nobel Prize in Physics 2022. Anton Zeilinger was awarded his share of the price in part for his experiments on transmission of
entangled photons over large distances from the Roque de Los Muchachos and Teide observatories. This pioneering work helped lay the foundations for future secure quantum-encrypted communication.
The first experiments carried out in 2006 were followed by a more sophisticated setup in 2012 allowing Zeilinger's team to establish the teleportation of quantum states at a record distance of 143 km. This time they used, on the emitting side, the facilities of the Jacobus Kapteyn Telescope (JKT) of the Isaac Newton Group of Telescopes (ING), and, on the receiving side, the 1-meter Optical Ground Station of the European Space Agency in IAC's Teide Observatory on Tenerife (see Quantum Teleportation Experiment Sets a New Record).
In 2018, the team used the William Herschel Telescope (WHT) and the Telescopio Nazionale Galileo (TNG) to carry out an unusual
experiment aimed at plugging a loophole in the conventional
interpretation of quantum mechanics.
This involved pointing the two telescopes at distant
quasars on opposite sides of the sky, and using the properties of the
detected photons to trigger polarisation measurements on a pair of
entangled photons generated near the NOT (and fired towards the
WHT and TNG). The results confirmed the predictions of
quantum mechanics (see Quantum Entanglement Confirmed with Light from Distant Quasars).