Once described by Einstein as “spooky action at a distance” For the first time, physicists at the Institute for Quantum Computing (IQC) at the University of Waterloo have demonstrated the distribution of three entangled photons at three different locations (Alice, Bob and Charlie) several hundreds of metres apart. Quantum entanglement is a phenomenon of quantum mechanics where an extremely strong correlation exists between quantum particles. “Three-particle entanglement is more complex than that of pairs. We can exploit the complex behaviour to rule out certain descriptions of nature or as a resource for new quantum technologies.” The UQD time tagging devices also ensured the measurements happened in a very small time window (three nanoseconds), meaning that no information could possibly be transmitted from one location to the other during the measurement period – a critical condition to prove the non-locality of entanglement. It opens the possibility for multipartite quantum communication protocols, including Quantum Key Distribution (QKD), third man cryptography and quantum secret sharing.
Posted on: Tue, 01 Apr 2014 22:52:44 +0000
Trending Topics
Recently Viewed Topics
© 2015