Physicists Xiao-Hui Bao and Jian-Wei Pan Stretch Enatglement to 50 Kilometers at the University of Science and Technology of China
Entanglement is a quantum mechanical link. An atom can spin both clockwise and counterclockwise at the same time, until measured when its dual state is defined one way or the other.
Though individually in uncertain states, whenever two atoms are entangled such that their spins are correlated in opposite directions; when physicists measure the first atom and find it spinning clockwise, they know instantly the other one no matter how far away, must be spinning counterclockwise.
With their work at the University of Science and Technology of China in Beijing, physicists Xiao-Hui Bao and Jian-Wei Pan have demonstrated the entanglement link can be stretched to a distance of 50 Kilometers.