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 ")

High Fidelity Produces More Expressive Avatars!
'They are the audiovisual bodies that people use to communicate with each other...'- Neal Stephenson, 1992.

Nexus 6 Phone Vs. Nexus-6 Android Comparison
'Ten million possible combinations of cerebral activity'- Philip K. Dick, 1968. (Includes a preview of Nexus-7!)

India's Commuters Face Philip K Dick's 'Sales Pitch' Future
'All around him the vague half-defined echoes of ads glittered and gibbered...'- Philip K. Dick, 1954.

Secret Service Wants Sarcasm-Detection Software
There must be some website able to help them.

 

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

Physicists Build Repulsor / Tractor Beam
'Brandon swung mighty tractor beams upon the severed halves of the Jovian vessel...'

High Fidelity Produces More Expressive Avatars!
'They are the audiovisual bodies that people use to communicate with each other...'

Will You Upload Your Mind Anytime Soon?
And if so, how long will the copy last?

Students! NASA Wants To 3D Print Your Tool Design In Space!
'Mass-produced only in the orbiting factories...'

Amazing ARES Augmented Reality Sandbox
'First he showed him where the input and output of his brand-new kingdom were, and how to program wars...'

'3D Light Sculpture' Projected Directly Onto Retina
'...projects directly on the retina of the eye'

3D Printer Vending Machine Dispenses Dreams
'Nanofax AG offers a technology that digitally reproduces objects, physically, at a distance.'

Why Not Nurse Grandma With A Robot?
'She's made of a combination of springs, levers, acoustic instruments...'

Flock Of Minisats Will Image The Earth
'We... dropped roughly a thousand eyes on Beta Hydri IV.'

Should Robots Have Civil Rights?
'I've seen things... you people wouldn't believe...'

Robert Heinlein, Your Self-Driving Car Is Almost Ready!
'Mary Risling settled back for a little nap...'

The Manned Maneuvering Unit Story
'Little spurts of red-orange flame from the reaction pistol marked his companion's trail...'

Scheherazade, An Open Story Generator
'How can you compete with an IBM heavy-duty logomatic analogue?'

Sample The In Vitro Meat Cookbook
'I grabbed two Syntho-Steaks out of the freezer...'

'Diamond Nanothreads' Now, Someday Space Elevators?
'It is a continuous pseudo-one dimensional diamond crystal'

Erased Memories In A Flash Of Light
'Someone, probably at a government military-sciences lab, erased his conscious memories...'

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.