Featured Research

from universities, journals, and other organizations

Building A Better Qubit: Combining Six Photons Avoids Quantum Data Scrambling

Date:
October 11, 2009
Source:
American Physical Society
Summary:
The qubits that carry quantum information are typically fragile, but a new method of combing six photons leads to robust qubits that are immune to many of the effects that threaten to scramble quantum data.

A new method for combining six photons together results in a highly robust qubit capable of transporting quantum information over long distances.
Credit: Image courtesy of Carin Cain

Exploiting quantum mechanics for transmitting information is a tantalizing possibility because it promises secure, high speed communications. Unfortunately, the fragility of methods for storing and sending quantum information has so far frustrated the enterprise. Now a team of physicists in Sweden and Poland have shown that photons that encode data have strength in numbers.

Their experiment is reported in Physical Review Letters and Physical Review A and highlighted in the October 5 issue of Physics (http://physics.aps.org).

In classical communications, a bit can represent one of two states - either 0 or 1. But because photons are quantum mechanical objects, they can exist in multiple states at the same time. Photons can also be combined, in a process known as entanglement, to store a bit of quantum information (i.e. a qubit).

Unlike data stored in a computer or typically sent through conventional fiber optic cables, however, qubits are extremely fragile. A kink in a cable, the properties of the cable material, or even changes in temperature can corrupt a qubit and destroy the information it carries. But now a group lead by Magnus Rεdmark at Stockholm University has shown that six entangled photons can encode information that stands up to some knocking around.

Rεdmark and his team proved experimentally that their six photon qubits are robust and should be able to reliably carry information over long distances. The technology to encode useful information on the qubits and subsequently read it back is still lacking, but once those problems are solved, we will be well on our way to secure, reliable, and speedy quantum communication.

 


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. "Building A Better Qubit: Combining Six Photons Avoids Quantum Data Scrambling." ScienceDaily. ScienceDaily, 11 October 2009. <www.sciencedaily.com/releases/2009/10/091005123050.htm>.
American Physical Society. (2009, October 11). Building A Better Qubit: Combining Six Photons Avoids Quantum Data Scrambling. ScienceDaily. Retrieved April 21, 2014 from www.sciencedaily.com/releases/2009/10/091005123050.htm
American Physical Society. "Building A Better Qubit: Combining Six Photons Avoids Quantum Data Scrambling." ScienceDaily. www.sciencedaily.com/releases/2009/10/091005123050.htm (accessed April 21, 2014).

Share This



More Computers & Math News

Monday, April 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Nintendo Changed Gaming World, but Its Future Uncertain: Upstone

Nintendo Changed Gaming World, but Its Future Uncertain: Upstone

AFP (Apr. 19, 2014) — The Nintendo Game Boy celebrates its 25th anniversary Monday and game expert Stephen Upstone says the console can be credited with creating a trend towards handheld gaming devices. Duration: 01:21 Video provided by AFP
Powered by NewsLook.com
Why Did Nike Fire Most Of Its Nike FuelBand Team?

Why Did Nike Fire Most Of Its Nike FuelBand Team?

Newsy (Apr. 19, 2014) — Nike fired most of its Digital Sport hardware team, the group behind Nike's FuelBand device. Could Apple or an overcrowded market be behind layoffs? Video provided by Newsy
Powered by NewsLook.com
Nearly Two Weeks On, The Internet Copes With Heartbleed

Nearly Two Weeks On, The Internet Copes With Heartbleed

Newsy (Apr. 19, 2014) — The Internet is taking important steps in patching the vulnerabilities Heartbleed highlighted, but those preventive measures carry their own costs. Video provided by Newsy
Powered by NewsLook.com
Facebook To Share Nearby Friends Data With Advertisers

Facebook To Share Nearby Friends Data With Advertisers

Newsy (Apr. 19, 2014) — A Facebook spokesperson has confirmed the company will use GPS data from the new Nearby Friends feature for advertising sometime in the future. 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