Featured Research

from universities, journals, and other organizations

Diamonds shine in quantum networks: Researchers hitch precious stone's impurities onto nano-resonators

Date:
April 26, 2011
Source:
University of Calgary
Summary:
Researchers have come up with a way to use impurities in diamonds as a method of creating a node in a quantum network.

When it comes to dreaming about diamonds, energy efficiency and powerful information processing aren't normally the thoughts that spring to mind. Unless, of course, you are a quantum physicist looking to create the most secure and powerful networks around.

Researchers at the University of Calgary and Hewlett Packard Labs in Palo Alto, California, have come up with a way to use impurities in diamonds as a method of creating a node in a quantum network. In addition to making powerful and secure networks, this discovery may also help sensitive measurements of magnetic fields and create new powerful platforms useful for applications in biology.

"Impurities in diamonds have recently been used to store information encoded onto their quantum state, which can be controlled and read out using light. But coming up with robust way to create connections needed to pass on signals between these impurities is difficult," says Dr. Paul Barclay, who recently moved to Calgary to start labs at the University of Calgary in the Institute for Quantum Information Science and at the National Institute for Nanotechnology in Edmonton.

"We have taken an important step towards achieving this," adds Barclay.

Barclay and colleagues Dr. Andrei Faraon, Dr. Kai-Mei Fu, Dr. Charles Santori and Dr. Ray Beausoleil from Hewlett Packard have published a paper on their research in the journal Nature Photonics.

Impurities in diamonds are responsible for slightly altering the material's colour, typically adding a slight red or yellow tint. The "NV center" impurity, which consists of a nitrogen atom and a vacancy in otherwise perfect diamond carbon lattice, has quantum properties that researchers are learning to exploit for useful applications.

In principle, individual particles of light, photons, can be used to transfer this quantum information between impurities, each of which could be a node in a quantum network used for energy efficient and powerful information processing. In practice, this is challenging to demonstrate because of the small size of the impurities (a few nanometers) and the experimental complexity that comes along with studying and controlling several nanoscale quantum systems at once.

Researchers at Hewlett Packard Labs and Barclay, who worked on this research at HP and is now a professor in the Department on Physics and Astronomy at the University of Calgary, have created photonic "microring resonators" on diamond chips. These microrings are designed to efficiently channel light between diamond impurities, and an on-chip photonic circuit connected to quantum impurities at other locations on the chip.

In future work, this microring will be connected to other components on the diamond chip, and light will be routed between impurities.

"This work demonstrates the important connection between fundamental physics, blue sky applications, and near-term problem solving. It involves many of the same concepts being pushed by companies such as HP, IBM, and Intel who are beginning to integrate photonics with computer hardware to increase performance and reduce the major problem of heat generation," says Barclay.


Story Source:

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


Journal Reference:

  1. Andrei Faraon, Paul E. Barclay, Charles Santori, Kai-Mei C. Fu, Raymond G. Beausoleil. Resonant enhancement of the zero-phonon emission from a colour centre in a diamond cavity. Nature Photonics, 2011; DOI: 10.1038/nphoton.2011.52

Cite This Page:

University of Calgary. "Diamonds shine in quantum networks: Researchers hitch precious stone's impurities onto nano-resonators." ScienceDaily. ScienceDaily, 26 April 2011. <www.sciencedaily.com/releases/2011/04/110426122954.htm>.
University of Calgary. (2011, April 26). Diamonds shine in quantum networks: Researchers hitch precious stone's impurities onto nano-resonators. ScienceDaily. Retrieved September 18, 2014 from www.sciencedaily.com/releases/2011/04/110426122954.htm
University of Calgary. "Diamonds shine in quantum networks: Researchers hitch precious stone's impurities onto nano-resonators." ScienceDaily. www.sciencedaily.com/releases/2011/04/110426122954.htm (accessed September 18, 2014).

Share This



More Computers & Math News

Thursday, September 18, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

What HealthKit Bug Means For Your iOS Fitness Apps

What HealthKit Bug Means For Your iOS Fitness Apps

Newsy (Sep. 18, 2014) Apple has delayed the launch of the HealthKit app platform, citing a bug. Video provided by Newsy
Powered by NewsLook.com
Let's Review Apple's Latest iPhone Reviews

Let's Review Apple's Latest iPhone Reviews

Newsy (Sep. 17, 2014) The tech press has shared its thoughts on the latest iterations of Apple's iPhone. We summarize the reactions to help you decide: iPhone 6 or 6 Plus? Video provided by Newsy
Powered by NewsLook.com
Facebook Reportedly Building Another New Photo Sharing App

Facebook Reportedly Building Another New Photo Sharing App

Newsy (Sep. 17, 2014) Sources tell TechCrunch Facebook is working on Moments, an app for sharing photos with close friends and family. But why develop yet another new app? Video provided by Newsy
Powered by NewsLook.com
What Not To Do When Installing iOS 8

What Not To Do When Installing iOS 8

Newsy (Sep. 17, 2014) Several sites are warning early adopters not to enable Apple’s new iCloud Drive feature during the installation process. 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:
from the past week

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