Satellite quantum communication circles closer

时间:2017-06-25 02:01:11166网络整理admin

By Eugenie Samuel Reich COMMUNICATIONS protected by quantum encryption systems offer unconditional security – if you know which way is up. A new quantum protocol is the first that promises to work independently of orientation, which will prove vital if quantum communications are ever to be sent via satellites. Many quantum encryption protocols work by measuring the “up” or “down” spins on pairs of entangled photons shared between a sender, conventionally called Alice,