Featured Research

from universities, journals, and other organizations

Straightening messy correlations with a quantum comb

Date:
November 24, 2009
Source:
American Physical Society
Summary:
Scientists have shown how to delicately comb out a snarl of entanglements among many qubits while keeping the information intact.

Quantum computing promises ultra-fast communication, computation and more powerful ways to encrypt sensitive information. But trying to use quantum states as carriers of information is an extremely delicate business. Now two physicists have shown, mathematically, how to gently tease out unwanted knots in quantum communication, while keeping the information intact.

Related Articles


When two particles are entangled, they effectively act as a single entity, even though they might be on opposite ends of the galaxy. Physicists can code information into particles to make quantum bits, or qubits, then entangle the qubits in an orderly fashion to form an entangled bit, or ebit. Ebits can then be used to create incredibly tough codes or teleport information between two distant systems. But messy entanglements among particles make qubits more susceptible to losing their encoded information.

Now Dong Yang and Jens Eisert of the University of Potsdam have shown how to delicately comb out a snarl of entanglements among many qubits while keeping the information intact. They designate one qubit as a hub and then use a combination of two existing quantum protocols to transform the original cat's cradle into an arrangement where entanglement fans out neatly from the hub qubit to each of the other qubits. This looks like a primitive model for a quantum World Wide Web: individual users each form an ebit with a single quantum search engine, and send queries and receive results via quantum teleportation.

Their work is reported in the current issue of Physical Review Letters and highlighted with a Viewpoint in Physics.


Story Source:

The above story is based on materials provided by American Physical Society. Note: Materials may be edited for content and length.


Cite This Page:

American Physical Society. "Straightening messy correlations with a quantum comb." ScienceDaily. ScienceDaily, 24 November 2009. <www.sciencedaily.com/releases/2009/11/091123094124.htm>.
American Physical Society. (2009, November 24). Straightening messy correlations with a quantum comb. ScienceDaily. Retrieved January 29, 2015 from www.sciencedaily.com/releases/2009/11/091123094124.htm
American Physical Society. "Straightening messy correlations with a quantum comb." ScienceDaily. www.sciencedaily.com/releases/2009/11/091123094124.htm (accessed January 29, 2015).

Share This


More From ScienceDaily



More Computers & Math News

Thursday, January 29, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

'Brand Blocker' Glasses Blur Ads in Real Time

'Brand Blocker' Glasses Blur Ads in Real Time

Buzz60 (Jan. 28, 2015) A team of college students design and build a pair of goggles that will obscure any corporate branding from your field of vision. Jen Markham (@jenmarkham) has the story. Video provided by Buzz60
Powered by NewsLook.com
iPhone Sales Give Apple Record Quarter

iPhone Sales Give Apple Record Quarter

AP (Jan. 28, 2015) Apple says staggering consumer demand for new iPhones has helped the company report record-smashing earnings for its latest quarter and primed its stock for a rally. (Jan. 28) Video provided by AP
Powered by NewsLook.com
Google Fiber Pressures Incumbent ISPs With Latest Expansion

Google Fiber Pressures Incumbent ISPs With Latest Expansion

Newsy (Jan. 28, 2015) Google’s newly announced Fiber cities put it in closer competition with the likes of AT&T and Time Warner Cable. Video provided by Newsy
Powered by NewsLook.com
Google High-Speed Service Coming to 4 Cities

Google High-Speed Service Coming to 4 Cities

AP (Jan. 28, 2015) Google is expanding its fiber-optic high-speed internet service to four cities in the Southeastern US. The company selected Atlanta, Charlotte, Raleigh and Nashville and their surrounding communities. (Jan. 28) Video provided by AP
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