Physicists experimentally demonstrate one-way quantum steering
Monday, September 17, 2012 - 12:00
in Physics & Chemistry
(Phys.org)—When Einstein described the interaction between two distant objects as "spooky interaction at a distance," he was referring to the quantum phenomenon called steering. Steering can occur in strongly entangled systems and implies a direction between the two parties involved, while entanglement without steering generally has no direction. In 1992, physicists experimentally demonstrated steering in both directions – that is, both parties could steer each other. Now for the first time, physicists have demonstrated steering in one direction only, a feat that gives new insight into the quantum world and that could have applications in quantum information.