Multi-Party Quantum Communication Possible

Physicists at the Institute for Quantum Computing at the University of Waterloo have demonstrated distributed communication between three entangled photons, at three different locations. The locations, designated as Alice, Bob, and Charlie in the picture below, are several hundreds of meters apart. This experiment proves quantum nonlocality for more than two entangled photons (see the figure below):


(Photons generated in the lab were beamed to separate trailers)

The experiment demonstrated the distribution of three entangled particles, which can eventually be used to do more than pairwise communication where only one party can communicate with another. It opens the possibility for multipartite quantum communication protocols, including Quantum Key Distribution (QKD), third man cryptography, and quantum secret sharing.

The interesting result is that we now have the ability to do more than paired quantum communication, said the papers lead author Chris Erven, a former IQC PhD student who is now a research assistant at the University of Bristol.

QKD, so far, has been a pairwise system meaning that it works best and with less assumptions when youre only talking with one other person. This is the first experiment where you can now imagine a network of people connected in different ways using the correlations between three or more photons.

As soon as I heard about this successful experiment, I knew I had heard about this kind of communication system before. In James Blish's 1954 story, he introduces the idea of a Dirac Transmitter; the quote below comes from his 1957 novels combined as Cities in Flight. The Dirac transmitter is a multi-party communication system that allows instantaneous communication across the universe:

...one of the things they offer in payment is a new course which they say will take us into an iron-bearing star cluster, very recently settled, where there's likely to be plenty of work for us."

"So they say."

"...and I belive them," Lutz said sharply. "Everything they've said to me, they've also said on the open air, by Dirac transmitter. The cops have heard every word, not only locally, but wherever in the whole universe that there's a Dirac transceiver."

From Kurzweil AI.

Scroll down for more stories in the same category. (Story submitted 3/26/2014)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 0 )

Related News Stories - (" Communication ")

Douglas Adams Your Babel Fish Is Ready - The Pilot By Waverly
'You'll need to have this fish in your ear.' - Douglas Adams, 1979.

Cortana Clip - The New In-Ear Wearables
'And in her ears the little Seashells, the thimble radios tamped tight...' - Ray Bradbury, 1953.

FlexEnable OLED Bracelet SmartPhone Concept
'The tiny screen in the bracelet's center...' - Roger Zelazny, 1980.

The 'Internet Of Touch' For Telemedicine
'Immediately an enormous apparatus fell on to her out of the ceiling...' - EM Forster, 1909.

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

 

Current News

Kuka Robots Mastering Tennis Now
'The robot solemnly hit a ball against the wall...'

Skingun Now More Advanced, Apparently
'Over her lacerated right shoulder he sprayed art-derm...'

Railguns For Surface Ships
'It was simply a long solenoid that threw little steel bullets...'

Six Amazing Surgical Robots In One Video
Micro-surgery!

Ignition Interlock Devices Stopped 1.7 Million Drunken Tries
'Maybe the car was right...'

Man Filmed Sleeping In Tesla On Autopilot
'Mary Risling settled back for a little nap...'

Otto Self-Driving Truck Kits
'Trucks gulped packages and scurried like beetles...'

Humans Help Robots Identify Recyclables
'You give it a good look... then press the right button and in she goes.'

Is This Robotic Hand As Quick As Yours?
'V-Stephen's surgeon-hand, a self-contained robot of precision quality...'

DARPA's XS-1 Spaceplane
'They were more airplane than spaceship...'

Douglas Adams Your Babel Fish Is Ready - The Pilot By Waverly
'You'll need to have this fish in your ear.'

OMG! DIY Arduino Robot Vacuum Cleaner Like Bradbury's Mice
'Out of warrens in the wall, tiny robot mice darted.'

NASA Culturing ISS Walls For Microbes
'Collect organisms and dust for study...'

Siemens 3D Printing Robot Spiders
'The eight thin metallic legs were pointed downwards, balanced delicately...'

Implants Melt In Your Brain, Not In Your Hands
Implant and forget - they melt in your brain, not in your hands.

Baby Boomers Will LOVE Autonomous Cars (Trust Me!)
'Old people began to cross the continent in their own cars....'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.