Quantum communication takes a new twist
Delicate entanglement between photon pairs preserved over long distance
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/08/ag_quantumcomm_free.jpg?fit=860%2C460&ssl=1)
TWISTED MESSAGE A radar tower at the Central Institute for Meteorology and Geodynamics in Vienna was used to beam photons imparted with a twist to a detector three kilometers away.
ZAMG/Mathias Stampfl/Wikimedia Commons