Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > NIST Demonstrates Better Memory with Quantum Computer Bits

Abstract:
Improved prospects for making practical, reliable quantum computers

NIST Demonstrates Better Memory with Quantum Computer Bits

August 11, 2005

Physicists at the National Institute of Standards and Technology (NIST) have used charged atoms (ions) to demonstrate a quantum physics version of computer memory lasting longer than 10 seconds—more than 100,000 times longer than in previous experiments on the same ions. The advance improves prospects for making practical, reliable quantum computers (which make use of the properties of quantum systems rather than transistors for performing calculations or storing information). Quantum computers, if they can be built, could break today’s best encryption systems, accelerate database searching, develop novel products such as fraud-proof digital signatures or simulate complex biological systems to help design new drugs.

As described in the Aug. 5, 2005, issue of Physical Review Letters,* NIST scientists stored information in single beryllium ions for longer periods of time by using a different pair of the ions’ internal energy levels to represent 1 and 0 than was used in the group's previous quantum computing experiments. This new set of quantum states is unaffected by slight variations in magnetic fields, which previously caused memory losses in ions stored in electromagnetic traps.

Quantum memory must be able to store “superpositions,” an unusual property of quantum physics in which a quantum bit (qubit) such as an ion represents both 0 and 1 at the same time. The new approach enables qubits to maintain superpositions over 1 million times longer than might be needed to carry out the information processing steps in a future quantum computer. The advance is, therefore, an important step toward the goal of designing a “fault tolerant” quantum computer because it significantly reduces the computing resources needed to correct memory errors.

In related experiments also described in the paper, NIST scientists demonstrated that pairs of “entangled” ions can retain their quantum states for up to about 7 seconds. Entanglement is another unusual property of quantum physics that correlates the behavior of physically separated ions. Superposition and entanglement are the two key properties expected to give quantum computers great power.

The research was supported by the Advanced Research and Development Activity/National Security Agency. More information about NIST's quantum computing research is available at NIST: Physics Laboratory's - Quantum Information.

* C. Langer, R. Ozeri, J.D. Jost, J. Chiaverini, B. DeMarco, A. Ben-Kish, R.B. Blakestad, J. Britton, D.B. Hume, W.M. Itano, D. Leibfried, R. Reichle, T. Rosenband, T. Schaetz, P.O. Schmidt and D. J. Wineland. Long-lived qubit memory using atomic ions. Physical Review Letters, 95, 060502 (2005).

####

About National Institute of Standards and Technology (NIST):
From automated teller machines and atomic clocks to mammograms and semiconductors, innumerable products and services rely in some way on technology, measurement, and standards provided by the National Institute of Standards and Technology.

Founded in 1901, NIST is a non-regulatory federal agency within the U.S. Commerce Department's Technology Administration. NIST's mission is to develop and promote measurement, standards, and technology to enhance productivity, facilitate trade, and improve the quality of life.

For more information, please visit www.NIST.gov

Media Contact:
Laura Ost laura.ost@nist.gov (301) 975-4034

Copyright © NIST

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

Possible Futures

A novel method for identifying the body’s ‘noisiest’ networks November 19th, 2014

Researchers discern the shapes of high-order Brownian motions November 17th, 2014

VDMA Electronics Production Equipment: Growth track for 2014 and 2015 confirmed: Business climate survey shows robust industry sector November 14th, 2014

Open Materials Development Will Be Key for HP's Success in 3D Printing: HP can make a big splash in 3D printing, but it needs to shore up technology claims and avoid the temptation of the razor/razor blade business model in order to flourish November 11th, 2014

Quantum Computing

University of Minnesota engineers make sound loud enough to bend light on a computer chip: Device could improve wireless communications systems November 28th, 2014

Pseudospin-driven spin relaxation mechanism in graphene November 11th, 2014

Heat Transfer Sets the Noise Floor for Ultrasensitive Electronics November 11th, 2014

Noise in a microwave amplifier is limited by quantum particles of heat November 10th, 2014

Announcements

University of Minnesota engineers make sound loud enough to bend light on a computer chip: Device could improve wireless communications systems November 28th, 2014

Study details laser pulse effects on behavior of electrons November 28th, 2014

Single-atom gold catalysts may offer path to low-cost production of fuel and chemicals November 28th, 2014

Production of Anticancer Drug from Nanofibers in Iran November 28th, 2014

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More












ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE