Featured Research

from universities, journals, and other organizations

Scientists Demonstrate All-fiber Quantum Logic

Date:
June 4, 2009
Source:
University of Bristol
Summary:
A team of physicists and engineers have demonstrated all-fiber quantum logic, where single photons are generated and used to perform the controlled-NOT quantum logic gate in optical fibers with high fidelity.

Photonic crystal fibre.
Credit: Image courtesy of University of Bristol

A team of physicists and engineers have demonstrated all-fiber quantum logic, where single photons are generated and used to perform the contolled-NOT quantum logic gate in optical fibers with high fidelity.

The only quantum technology in practical use today is quantum cryptography and is currently limited in the distance over which secure communication may occur.

More sophisticated quantum networks will require multiple nodes with the ability to implement small-scale quantum processing in order to increase the range of quantum communications.  Such networks will rely on optical fiber links, making fiber-based photon generation and information processing of key technological importance.

Jeremy O’Brien, Professor of Physics and Electrical Engineering at Bristol University and colleagues, have shown it is possible for a high-fidelity fiber controlled-NOT gate to operate with fiber heralded single-photon sources.

Professor O’Brien speaking about the research, said: “On the basis of a simple model we are able to conclude that imperfections are primarily due to the photon sources, meaning that the gate itself works with very high fidelity.”

“Such all fiber quantum information processing will likely have important applications in future quantum networks.”

All-fiber quantum information processing could be used in less mature quantum technologies such as computing, communication and advanced measurement, as well as in the fundamental science of quantum optics.

The team reported its results in the March 2009 issue of Physical Review A (Vol 79, No 3).


Story Source:

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


Journal Reference:

  1. Alex S. Clark, Jérémie Fulconis, John G. Rarity, William J. Wadsworth, and Jeremy L. O%u2018Brien. All-optical-fiber polarization-based quantum logic gate. Physical Review A, 2009; 79 (3): 030303 DOI: 10.1103/PhysRevA.79.030303

Cite This Page:

University of Bristol. "Scientists Demonstrate All-fiber Quantum Logic." ScienceDaily. ScienceDaily, 4 June 2009. <www.sciencedaily.com/releases/2009/05/090528135246.htm>.
University of Bristol. (2009, June 4). Scientists Demonstrate All-fiber Quantum Logic. ScienceDaily. Retrieved September 1, 2014 from www.sciencedaily.com/releases/2009/05/090528135246.htm
University of Bristol. "Scientists Demonstrate All-fiber Quantum Logic." ScienceDaily. www.sciencedaily.com/releases/2009/05/090528135246.htm (accessed September 1, 2014).

Share This




More Computers & Math News

Monday, September 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Apple's Rumored iWatch Could Cost $400

Apple's Rumored iWatch Could Cost $400

Newsy (Aug. 31, 2014) — Apple is expected to charge a premium for its still-rumored wearable device. Video provided by Newsy
Powered by NewsLook.com
Young Entrepreneurs Get $100,000, If They Quit School

Young Entrepreneurs Get $100,000, If They Quit School

AFP (Aug. 29, 2014) — Twenty college-age students are getting 100,000 dollars from a Silicon Valley leader and a chance to live in San Francisco in order to work on the start-up project of their dreams, but they have to quit school first. Duration: 02:20 Video provided by AFP
Powered by NewsLook.com
JPMorgan Chase Confirms Possible Cyber Attack

JPMorgan Chase Confirms Possible Cyber Attack

Reuters - US Online Video (Aug. 28, 2014) — Attackers stole checking and savings account information and lots of other data from JPMorgan Chase, according to the New York Times. Other banks are believed to be victims as well. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Spend 2 Minutes Watching This Smartwatch Roundup

Spend 2 Minutes Watching This Smartwatch Roundup

Newsy (Aug. 28, 2014) — LG announces a round-faced smartwatch, Samsung adds 3G connectivity to its latest wearable, and Apple will reportedly announce the iWatch on Sept. 9. 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