Featured Research

from universities, journals, and other organizations

Safeguarding data in future quantum computing: Physicists detect and control quantum states in diamond with light

Date:
October 15, 2010
Source:
University of California -- Santa Barbara
Summary:
Physicists have succeeded in combining laser light with trapped electrons to detect and control the electrons' fragile quantum state without erasing it. This is an important step toward using quantum physics to expand computing power and to communicate over long distances without the possibility of eavesdropping.

Physicists at UC Santa Barbara have succeeded in combining laser light with trapped electrons to detect and control the electrons' fragile quantum state without erasing it. This is an important step toward using quantum physics to expand computing power and to communicate over long distances without the possibility of eavesdropping. The work appears in Science.

Related Articles


The research, led by David Awschalom, professor of physics, electrical and computer engineering, and director of UCSB's Center for Spintronics and Quantum Computation, and graduate student Bob Buckley, exploits an unusual property of the microscopic quantum world: the ability to combine things that are very different.

Using electrons trapped in a single atom-sized defect within a thin crystal of diamond, combined with laser light of precisely the right color, the scientists showed that it was possible to briefly form a mixture of light and matter. After forming this light-matter mixture, they were able to use measurements of the light to determine the state of the electrons.

Likewise, by separately examining the electrons, they showed that the electron configuration was not destroyed by the light. Instead, it was modified -- a dramatic demonstration of control over quantum states using light. "Manipulating the quantum state of a single electron in a semiconductor without destroying the information represents an extremely exciting scientific development with potential technological impact," said Awschalom.

Preserving quantum states is a major obstacle in the nascent field of quantum computing. One benefit of quantum information is that it can never be copied, unlike information transferred between today's computers, providing a measure of security that is safeguarded by fundamental laws of nature. The ability to measure a quantum state without destroying it is an important step in the development of technologies that harness the advantages of the quantum world.

Buckley, putting this research in perspective, said: "Diamond may someday become for a quantum computer what silicon is for digital computers today -- the building blocks of logic, memory, and communication. Our experiment provides a new tool to make that happen. "


Story Source:

The above story is based on materials provided by University of California -- Santa Barbara. Note: Materials may be edited for content and length.


Journal Reference:

  1. B. B. Buckley, G. D. Fuchs, L. C. Bassett, and D. D. Awschalom. Spin-Light Coherence for Single-Spin Measurement and Control in Diamond. Science, Online October 14 2010 DOI: 10.1126/science.1196436

Cite This Page:

University of California -- Santa Barbara. "Safeguarding data in future quantum computing: Physicists detect and control quantum states in diamond with light." ScienceDaily. ScienceDaily, 15 October 2010. <www.sciencedaily.com/releases/2010/10/101014154753.htm>.
University of California -- Santa Barbara. (2010, October 15). Safeguarding data in future quantum computing: Physicists detect and control quantum states in diamond with light. ScienceDaily. Retrieved December 20, 2014 from www.sciencedaily.com/releases/2010/10/101014154753.htm
University of California -- Santa Barbara. "Safeguarding data in future quantum computing: Physicists detect and control quantum states in diamond with light." ScienceDaily. www.sciencedaily.com/releases/2010/10/101014154753.htm (accessed December 20, 2014).

Share This


More From ScienceDaily



More Computers & Math News

Saturday, December 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Building Google Into Cars

Building Google Into Cars

Reuters - Business Video Online (Dec. 19, 2014) Google's next Android version could become the standard that'll power your vehicle's entertainment and navigation features, Reuters has learned. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
After Sony Hack, What's Next?

After Sony Hack, What's Next?

Reuters - US Online Video (Dec. 19, 2014) The hacking attack on Sony Pictures has U.S. government officials weighing their response to the cyber-attack. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Navy Unveils Robot Fish

Navy Unveils Robot Fish

Reuters - Light News Video Online (Dec. 18, 2014) The U.S. Navy unveils an underwater device that mimics the movement of a fish. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
How 2014 Shaped The Future Of The Internet

How 2014 Shaped The Future Of The Internet

Newsy (Dec. 18, 2014) It has been a long, busy year for Net Neutrality. The stage is set for an expected landmark FCC decision sometime in 2015. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins