Entanglement-assisted Orientation in Space
  We demonstrate that quantum entanglement can help separated individuals in making decisions if their goal is to find each other in the absence of any communication between them. We derive a Bell-like inequality that the efficiency of every classical solution for our problem has to obey, and demonstrate its violation by the quantum efficiency. This proves that no classical strategy can be more efficient than the quantum one. 
Caslav Brukner, Nikola Paunkovic, Terry Rudolph, Vlatko Vedral