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 |
you like to contribute a story tip?
Get the URL of the story, and the related sf author, and add
Comment/Join discussion ( 1 )
Related News Stories -
The Largest Virtual Universe!
'...a machine able literally to contain the Universe Itself .' - Stanislaw Lem, 1965.
ARM Wants To Build Brain Chips
'Slivers of microsoft, angular fragments of colored silicon...' - William Gibson, 1984.
Robot Swarms Controlled With Augmented Reality
'You're not thinking in enough dimensions...' - Daniel Suarez, 2009.
Eterni.me - To Skype With The Dead
'Nothing... left of Jeserac but a galaxy of electrons frozen in the heart of a crystal.'- Arthur C. Clarke, 1956.
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.
Will A Steel Umbrella Stop Russia?
'Everyone was aware that the damned platform was wandering around in its own orbit...'
EVE Artificial Womb For Lambs (For Now)
'In the crimson darkness, stewing warm on their cushion of peritoneum and gorged with blood-surrogate and hormones...'
TIKAD Armed Drone Ready To Fight
'Each a television eye and a sonic stunner...'
Bees Royal Jelly Helps Wounds Heal Faster
'An alien drug... used by an insect race.'
NASA Wants To Make Oxygen On Mars
'They plop down on the Red and if the dust is deep enough ... they burrow in...'
Hackers Insert Malware Into DNA
'They tied the memory to the bloodline and that was their record!'
X2-VelociRoACH Cooperates To Launch Tiny Drones
Little robots cooperating can do big tasks. Eventually.
'Do Not Pay' Chatbots To Replace Law Firm Associates?
'I want my lawyer program.'
MULTI Model Of Star Trek Turbolift
Cool prototype video!
A Look Into The Future Of Spacecraft!
Ever wonder how you look when you enter a new part of a spacecraft?
An 'Ethical Black Box' For Robots?
Explored by science fiction authors.
Dadbot Digital Immortality
'A hardwired ROM cassette replicating a dead man's skills...'
Should We Permit Computers To Create Their Own Language?
'Talk Between Robots radio...'
Breakthrough Starshot Sprites Yearn For Alpha Centauri
'Whoever launched it fired a laser cannon...'
Kino Project Roaming Personal Fashion Robots
'Most of the crew have the tiny imp ride on their shoulder...'
Astronaut Exercise Video, Predicted By SF Writers
'Joe got out the gravity-simulator harnesses.'
More SF in the News Stories
More Beyond Technovelgy science news stories