facebook
twitter
rss
account
search
search
 

Fast quantum computer bit is created

Aug. 21, 2008 at 2:39 PM   |   Comments

ANN ARBOR, Mich., Aug. 21 (UPI) -- U.S. scientists say they have made the fastest quantum computer bit created, demonstrating the advantage of the qubit over the conventional bit.

Researchers at University of Michigan, U.S. Naval Research Laboratory and the University of California-San Diego said they used lasers to create an initialized quantum state of the solid-state qubit at rates of about a gigahertz per second.

A conventional bit can be a 0 or a 1, while a quantum bit, or qubit, can be both at the same time, the researchers said.

Physics Professor Duncan Steel, doctoral student Xiaodong Xu and their colleagues used lasers to coherently, or stably, trap the spin of one electron confined in a single semiconductor quantum dot. A quantum dot is similar to a transistor in a conventional computer.

"We are the first to show that you can do this to a single electron in a self-assembled quantum dot," Steel said. "If you're going to do quantum computing, you have to be able to work with one electron at a time."

A paper describing the complex research is available in the early online edition of the journal Nature Physics and will appear in print at a later date.

© 2008 United Press International, Inc. All Rights Reserved. Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI's prior written consent.
Recommended UPI Stories
Most Popular
1
Audi gets permit to test self-driving cars in California Audi gets permit to test self-driving cars in California
2
Say goodbye to Chinese sturgeon Say goodbye to Chinese sturgeon
3
Apple's latest operating system rolls out Wednesday afternoon Apple's latest operating system rolls out Wednesday afternoon
4
First 3D-printed car unveiled in Chicago First 3D-printed car unveiled in Chicago
5
Dogs are the favorite food of leopards in rural India Dogs are the favorite food of leopards in rural India
Trending News
Video
x
Feedback