Testing the speed of “spooky action at a distance” in a tabletop experiment
Luigi Santamaria Amato, Deborah Katia Pallotti, Mario Siciliani de Cumis +3 more
Nonlocality, probably the principal friction between Quantum Physics and Relativity, disturbed the physicists even more than realism since it looks to originate superluminal signalling, the Einsteinian "Spooky action at a distance". From 2000 on, several tests to set lower bounds of the Spooky action at a distance velocity ([Formula: see text]) have been performed. They are usually based on a Bell Test performed in km long and carefully balanced experimental setups to fix a more and more improved bound making some assumptions dictated by the experimental conditions. By exploiting advances in quantum technologies, we performed a Bell's test with an improved bound in a tabletop experiment of the order of few minutes, thus being able to control parameters otherwise uncontrollable in an extended setup or in long lasting experiments.
Scientific Reports•May 21, 2023•6 citations