Quantum entanglement wins Nobel physics laurels

for physics has been awarded to a trio of scientists whose insights into the fundamentals of quantum mechanics have set the stage for a new era of technology. , quantum networks and secure are all rooted in experiments carried out, over several decades, by Alain Aspect, John Clauser and Anton Zeilinger.Their work revolves around a phenomenon called quantum entanglement, in which two or more particles become correlated with each other so that they behave as if they were single units. This leads to counterintuitive effects—changing the properties of one particle in an entangled pair, for example, will immediately change the other, no matter how far apart the particles are. They could be right next to each other, or at opposite ends of the galaxy. Albert Einstein—who was no fan of the probabilistic nature of quantum mechanics—described entanglement as “spooky action at a distance”. He and others were concerned that it seemed to break the rules of special relativity, which stipulated that nothing could travel faster than the speed of light. If entangled particles were separated by a great distance, how could information apparently travel between them instantaneously?