News tagged with optical communication

A new approach to on-chip quantum computing

Commercial devices capable of encrypting information in unbreakable codes exist today, thanks to recent quantum optics advances, especially the generation of photon pairs—tiny entangled particles of light. ...

Oct 02, 2014
4.1 / 5 (14) 0

Making quantum encryption practical

One of the many promising applications of quantum mechanics in the information sciences is quantum key distribution (QKD), in which the counterintuitive behavior of quantum particles guarantees that no one can eavesdrop on ...

May 21, 2013
5 / 5 (5) 8 | with audio podcast

An infallible quantum measurement

Entanglement is a key resource for upcoming quantum computers and simulators. Now, physicists in Innsbruck and Geneva realized a new, reliable method to verify entanglement in the laboratory using a minimal ...

Aug 05, 2013
4.8 / 5 (33) 4 | with audio podcast

Quantum entanglement with notification

(Phys.org) -- German scientists have demonstrated a method of heralding entanglement between distant stationary quantum systems without destroying this particular state. The experimental set-up paves the way ...

Jul 16, 2012
5 / 5 (13) 21 | with audio podcast

Entangled Light in Bose-Einstein Condensates

(PhysOrg.com) -- When physicists entangle light, they usually use nonlinear crystals as the source. However, it’s difficult to control the entanglement generation process in a bulk crystal, and so scientists ...

Apr 08, 2009 feature
4.4 / 5 (16) 13

Scientists make quantum breakthrough

(PhysOrg.com) -- Scientists have demonstrated for the first time that atoms can be guided in a laser beam and possess the same properties as light guided in an optical communications fiber.

Apr 20, 2011
4.4 / 5 (21) 13 | with audio podcast