Subscribe to our free daily newsletters
  Space Industry and Business News  




Subscribe to our free daily newsletters



CHIP TECH
Tiny Laser Light Show Illuminates Quantum Computing

The researchers saw that the laser pulses also correctly manipulated the quantum properties of each target atom - in this case a line of five rubidium-87 atoms - without disturbing any neighboring atoms, which were separated by just 8.7 microns, about one-tenth the diameter of a human hair.
by Staff Writers
Washington DC (SPX) Dec 10, 2010
A new laser-beam steering system that aims and focuses bursts of light onto single atoms for use in quantum computers has been demonstrated by collaborating researchers from Duke University and the University of Wisconsin-Madison.

Described in the journal Applied Physics Letters, published by the American Institute of Physics, the new system is somewhat like the laser-light-show projectors used at rock concerts and planetariums. But it's much smaller, faster, atom-scale accurate and aimed at the future of computing, not entertainment.

In theory, quantum computers will be able to solve very complex and important problems if their basic elements, called qubits, remain in a special "quantum entangled" state for a long enough time for the calculations to be carried out before information is lost to natural fluctuations.

One of several promising approaches to quantum computing uses arrays of individual atoms suspended by electromagnetic forces.

Pulses of laser light manipulate the internal states of the atoms that represent the qubits, to carry out the calculation. However the lasers must also be focused and aimed so accurately that light meant for one atom doesn't affect its neighbors.

The new system did just that. Tiny micromirrors, each only twice the diameter of a human hair, pointed to each target atom in as little as 5 microseconds, which is about 1,000 times faster than sophisticated beam-steering mirrors developed for optical communications switching, not to mention the still slower units used in light shows.

The researchers saw that the laser pulses also correctly manipulated the quantum properties of each target atom - in this case a line of five rubidium-87 atoms - without disturbing any neighboring atoms, which were separated by just 8.7 microns, about one-tenth the diameter of a human hair.

"Our experiments demonstrated the crucial requirement that our micromirror system maintain the laser-beam quality necessary to manipulate the internal states of the individual atoms," said Jungsang Kim, leader of the Duke researchers who designed the micromirror system. The atomic physics experiments were performed in Mark Saffman's group at University of Wisconsin-Madison.

The groups plan to continue their collaboration, with future experiments targeting two-qubit gates, which are expected to be the basic building block of quantum logic, and atoms confined in larger two-dimensional arrays.

The article, "Independent individual addressing of multiple neutral atom qubits with a micromirror-based beam steering system" by Caleb Knoernschild, Xianli Zhang, Larry Isenhower, Alex T. Gill, Felix P. Lu, Mark Saffman, and Jungsang Kim appears in the journal Applied Physics Letters.



Share This Article With Planet Earth
del.icio.usdel.icio.us DiggDigg RedditReddit
YahooMyWebYahooMyWeb GoogleGoogle FacebookFacebook



Related Links
American Institute of Physics
Computer Chip Architecture, Technology and Manufacture
Nano Technology News From SpaceMart.com



Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News


CHIP TECH
Rice Physicists Discover Ultrasensitive Microwave Detector
Houston TX (SPX) Dec 10, 2010
Physicists from Rice University and Princeton University have discovered how to use one of the information technology industry's mainstay materials - gallium arsenide semiconductors - as an ultrasensitive microwave detector that could be suitable for next-generation computers. The discovery comes at a time when computer chip engineers are racing both to add nanophotonic devices directly to ... read more







CHIP TECH
World's First Microlaser Emitting In 3-D

Taiwan to approve three billion dollar China plant: report

Sony and Sharp launch e-readers, tablets in Japan

Google says 300,000 Android phones activated daily

CHIP TECH
Arianespace Will Orbit Sicral 2 Milcomms Satellites

Codan Receives JITC Certification For 2110 HF Manpack

Northrop Grumman Bids for Marine Corps Common Aviation CnC

DSP Satellite System Celebrates 40 Years

CHIP TECH
SpaceX Dragon Does Two Orbits Before Pacific Splashdown

ISRO Hands Two Contracts To Arianespace

US company readies first space capsule launch

Kazakh Space Agency Seeks Extra Funding For New Baikonur Launch Pad

CHIP TECH
Program Error Caused Russian Glonass Satellite Loss

GPS Not Working A Shoe Radar May Help You Find Your Way

GPS Satellite Achieves 20 Years On-Orbit

World-Leading Spatial Experts Meet In Sydney

CHIP TECH
NASA Research Park To Host World's Largest, Greenest Airship

Hong Kong's Cathay Pacific names new chief, eyes China

Iran upset over EU refusal to refuel its airplanes

Cathay Pacific chief nominated to take helm of IATA

CHIP TECH
Rice Physicists Discover Ultrasensitive Microwave Detector

UCSF Team Develops "Logic Gates" To Program Bacteria As Computers

Tiny Laser Light Show Illuminates Quantum Computing

Elusive Spintronics Success Could Lead To Single Chip For Processing And Memory

CHIP TECH
Snow From Space

ASU Researcher Uses NASA Satellite To Explore Archaeological Site

Google to pay couple one dollar for trespassing

Mapping Mangroves By Satellite

CHIP TECH
Eutrophication Makes Toxic Cyanobacteria More Toxic

Waste pollutes Adriatic coast

Neglected Greenhouse Gas Discovered By Atmosphere Chemists

Bhopal activists dismiss India's bid for extra compensation


The content herein, unless otherwise known to be public domain, are Copyright 1995-2010 - SpaceDaily. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement