The Latest In Quantum-Dot Switches

Quantum-dot switches made up of pairs of tiny puddles of forty to sixty paired electrons show promise as the building blocks for quantum computers. Each dot is only 200 nanometers wide. The two puddles are placed inside a semiconductor; each puddle is given a final, unpaired electron which gives the quantum dot a net spin of up or down. Finally, the two dot system is tuned so that the two unpaired electrons become "entangled" - that is, they begin to interact with each other.


(From Press Release)

"Entanglement is a key property that would help give a quantum computer its power," says lead researcher Albert M. Chang, adjunct professor of physics in Purdue's School of Science. "Because each system exists in this mixed, down-up configuration, it may allow us to create switches that are both on and off at the same time. That's something current computer switches can't do."

The hope for quantum computing is that, since a quantum computer's bits could be in two quantum states at once - both on and off - it might be possible to explore many different solutions simultaneously. "These computers would have massive parallelism built right in, allowing for the solution of many tough problems," Chang said. "But for us physicists, the possibilities of quantum computers extend beyond any single application. There also exists the potential to explore why there seem to be two kinds of reality in the universe one of which, in everyday language, is said to stop when you cross the border 'into the interior of the atom.'"

It is hoped that this method of producing qubits - quantum bits - will scale into large systems, a key advantage over previous methods. The speed at which Chang's qubit works is too slow for a marketable device; speed improvements are next.

SF author Greg Bear writes about a quantum logic thinker in his 1990 novel Heads.

See the news release Quantum computers are a quantum leap closer, say Purdue physicists.

Scroll down for more stories in the same category. (Story submitted 4/30/2004)

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 ( 1 )

Related News Stories - (" Computer ")

Neuromorphic Computing Hardare
'He had constructed an organ, a brain, of metal, entirely inorganic and lifeless...' - Edmond Hamilton, 1926.

Finally! Microsoft Surface Neo And Surface Duo Implement Excellent Courier Idea
'Runcible, whose pages were thicker and more densely packed with computational machinery...' - Neal Stephenson, 1995.

Tap Strap 2 Now With Air Mouse
'He waved his hand and the circuit switched abruptly.' - Philip K. Dick, 1955.

Entire Planet Modeled In New MS Flight Sim
'CIC uses [it] to keep track of every bit of spatial information that it owns...' - Neal Stephenson, 1992.

 

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

Surface Film Repels All Bacteria
'Most gentlemen's and ladies' gloves nowadays were constructed of infinitesimal fabricules that knew how to eject dirt...'

Chinese Steal American Seeds From Our Fields
'The Iszic maintain a jealously guarded monopoly...'

Rise Of Skywalker Could Trigger Epileptic Seizures
'... then the screen started to flicker. I stared at it for a while.'

Singing Ringing Tree Wind-Powered Sculpture
'It was like no music Dirk had ever heard, It was eerie and wild...'

Extremophile Microbe Loves Space Rocks
'... designed for rooting in the metal make-up of the asteroids for vital elements.'

Magic Mushroom Nose Spray From Silo Wellness
'I don't need help... that's not my diagnosis!'

CAV-X Supercavitating Ammo Deadly Underwater
'...in the midst of this fluid, which is very dense compared with the atmosphere, shots could not go far.'

Space Domes Over-rated? Science Fiction Authors Have Answers
'This was to be roofed over, sealed, and an atmosphere provided...'

Injectable Magnetic Fluid Slows Bleeding, Aids Magneto
'There's something different about you.'

Autonomous Wheelchairs Improve Airport Mobility
'Noiselessly, on rubber-tired wheels, they journeyed down the long aisles...'

HVSD, Kitty Hawk's Electric Plane
Very quiet commuter plane offers VTOL service.

Frictionless Toilet Could Save 140 Billion Liters Of Water
'The bowl was a frictionless surface...'

Viisights AI Hones Video Surveillance
'The math boys worked it out...'

Cybertruck The Solar-Powered Steel Tortoise
'It drew its power from... sunpower screens on its low curved roof.'

Road Noise Charges Electric Cars With Peugeot Piezoelectric Billboard
''... major cities of Earth have free electrical power conveniently processed from their own noise.'

Unsinkable Metal Latest Gates Obsession
'A metal... light as cork.'

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.