Quantum computing has long been the fodder of science fiction novels. Mark Eriksson, a University of Wisconsin-Madison physics professor, hopes to make the concept the basis for non-fiction papers instead. He and his associates have developed a type of "quantum dot" device for holding electrons that can be scaled up to build a working quantum computer. Each quantum dot device contains just one electron. When the devices are aligned, the electrons they house become usable quantum bits, or qubits, for computing. The design incorporates a "back-gate" that serves as an electron reservoir, a quantum well that confines electrons vertically, and split "top gates" that provide lateral confinement by electrostatic repulsion. "The novel feature of our design," says Eriksson, "is the combined use of vertical tunnel coupling through the back gate, together with lateral coupling defined by the split top gates." To load a single electron into a dot, the gate potentials are adjusted so that single-electron filling is energetically favored. Unlike the bits of classical, serial computers, which exist in either the 0 or 1 state, qubits can exist in more than one state at once. This elusive quality of their components frees quantum computers to calculate all the possible solutions to a problem simultaneously, instead of running through them one-by-one like their slower, serial counterparts. This ability to parallel process means quantum computers hold tremendous number-crunching potential for certain tasks such as highly sophisticated data encryption and code-breaking that now defy even the most powerful computers. The group is in the beginning stages. "People often talk about quantum computing in the future tense, but that's not really right it exists today. People have solved simple problems with it, but in the future we want to address problems that can't be solved by any other means," says Eriksson. For more information, contact Mark Eriksson either by phone (608) 263-2689 or e-mail maeriksson@facstaff.wisc.edu.
By refining topologies and using new fluid technology, Moog's new peak sine drive controller increases available power without increasing controller volume.
Lantronix Inc. has expanded its line of controllers for sensor networks with the release of a rugged controller that improves management of automation systems used in a number of industries, including manufacturing, oil and gas, and chemicals.
Inspired by the hooks a parasitic worm uses to penetrate its host's intestines, the Karp Lab has invented a flexible adhesive patch covered with microneedles that adheres well to wet, soft tissues, but doesn't cause damage when removed.
From Dell / Intel® New Paradigms in Design Work Scott Hamilton, vertical market strategist for Dell Precision workstations, 5/2/2013 3
Early in my career, I worked as a draftsman and remember the days of drawing on vellum with numbered pencils and Mylar with plastic lead. This was a fun experience in the sense that I ...
I've been using workstations for more than 10 years and love finding ways to get more performance from my system. With demanding professional applications that require more power each ...
A lasting memory from my first job as an engineer in an auto assembly plant is standing on hard concrete at six in the morning, vending-machine coffee clutched in hand, listening to ...
A quick look into the merger of two powerhouse 3D printing OEMs and the new leader in rapid prototyping solutions, Stratasys. The industrial revolution is now led by 3D printing and engineers are given the opportunity to fully maximize their design capabilities, reduce their time-to-market and functionally test prototypes cheaper, faster and easier. Bruce Bradshaw, Director of Marketing in North America, will explore the large product offering and variety of materials that will help CAD designers articulate their product design with actual, physical prototypes. This broadcast will dive deep into technical information including application specific stories from real world customers and their experiences with 3D printing. 3D Printing is
To save this item to your list of favorite Design News content so you can find it later in your Profile page, click the "Save It" button next to the item.
If you found this interesting or useful, please use the links to the services below to share it with other readers. You will need a free account with each service to share an item via that service.
Tweet This
7 
