Light drives electron logic

September 10/17, 2003

Although quantum computers have the potential to solve very large problems very quickly, and full-size quantum computers would render most of today's security software obsolete, building a quantum computer is extremely difficult, and working models are at least one to two decades away.

Researchers from the University of Michigan at Ann Arbor and the University of California San Diego at La Jolla have taken the proposition a step forward by demonstrating a conditional logic gate made from a pair of electrons trapped in a quantum dot.

The researchers' device acts as a two-bit conditional logic gate, and is controlled using light. It is the first such gate implemented in a solid-state device, according to the researchers.

A working quantum computer would require thousands or millions of such gates. The researchers are currently refining a method that includes a third electron, which will allow the system to hold information longer and be scaled up to large numbers of gates.

It will take at least ten years to assess the potential of different types of quantum computers, and longer than that to build one, according to the researchers. The work appeared in the August 7, 2003 issue of Science.

Page One

Display brighter than film

Sponges grow sturdy optical fiber

Electron teams make bigger qubits

Vision chip shines

News briefs:
VR system grabs 3D video
Quantum computing has limits
Gold speck highlights molecules
Neural net tracks skin color
Nano thermometer withstands heat
Light drives electron logic

Research Watch blog

View from the High Ground Q&A
How It Works

RSS Feeds:
News  | Blog

Ad links:
Buy an ad link


Ad links: Clear History

Buy an ad link

Home     Archive     Resources    Feeds     Glossary
TRN Finder     Research Dir.    Events Dir.      Researchers     Bookshelf
   Contribute      Under Development     T-shirts etc.     Classifieds

© Copyright Technology Research News, LLC 2000-2010. All rights reserved.