Featured Research

from universities, journals, and other organizations

First noiseless single photon amplifier

Date:
November 12, 2012
Source:
Griffith University
Summary:
Research physicists have demonstrated the first device capable of amplifying the information in a single particle of light without adding noise. The next step will be to build additional quantum teleportation into the experiment, which will make the noiseless amplifier more directly useful for long-distance communication.

Research physicists have demonstrated the first device capable of amplifying the information in a single particle of light without adding noise.

Related Articles


The research collaboration, involving Griffith University, The University of Queensland and University of Science and Technology of China, was able to amplify the noisy quantum state of a single photon subjected to loss, without adding noise in the process; in fact, their amplification reduced the noise in the quantum state.

The results have been published November 12 on the Nature Physics website.

Team leader, Professor Geoff Pryde from Griffith University's Centre for Quantum Dynamics said the breakthrough would provide a new tool for all sorts of new quantum technologies.

"This is the first time the information stored in a single photon has been amplified," Professor Pryde said.

"The technique works by combining the noisy quantum state with a 'clean' single photon in the amplifier, and using quantum teleportation to transfer the information onto the new photon.

"The most obvious application for this work is in improved quantum cryptography; secret messaging which is guaranteed secure by the laws of physics."

It is expected the results will stimulate further interest in the fundamental laws that govern how well amplifiers can work and in developing uses of noiseless amplification techniques for other quantum information technology applications.

Research into such applications is being pursued in Australia's Centre of Excellence for Quantum Computation and Communication Technology, as well as around the world.

Fellow team member Professor Tim Ralph from the University of Queensland said this breakthrough was the culmination of years of research.

"We have been developing the ideas and experimental techniques that led to this breakthrough for the past 4 years," Professor Ralph said.

"Quantum information is useful but very fragile and normal amplification techniques destroy it.

"The key feature of our photon amplifier is that it preserves the quantum information and may help overcome the current distance limitations of quantum communication."

The next step for the research team will be to build additional quantum teleportation into the experiment, which will make the noiseless amplifier more directly useful for long-distance communication.


Story Source:

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


Journal Reference:

  1. S. Kocsis, G. Y. Xiang, T. C. Ralph, G. J. Pryde. Heralded noiseless amplification of a photon polarization qubit. Nature Physics, 2012; DOI: 10.1038/nphys2469

Cite This Page:

Griffith University. "First noiseless single photon amplifier." ScienceDaily. ScienceDaily, 12 November 2012. <www.sciencedaily.com/releases/2012/11/121112101050.htm>.
Griffith University. (2012, November 12). First noiseless single photon amplifier. ScienceDaily. Retrieved November 23, 2014 from www.sciencedaily.com/releases/2012/11/121112101050.htm
Griffith University. "First noiseless single photon amplifier." ScienceDaily. www.sciencedaily.com/releases/2012/11/121112101050.htm (accessed November 23, 2014).

Share This


More From ScienceDaily



More Computers & Math News

Sunday, November 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

European Parliament Might Call For Google's Break-Up

European Parliament Might Call For Google's Break-Up

Newsy (Nov. 22, 2014) — This is the latest development in an antitrust investigation accusing Google of unfairly prioritizing own products and services in search results. Video provided by Newsy
Powered by NewsLook.com
Google Announces Improvements To Balloon-Borne Wi-Fi Project

Google Announces Improvements To Balloon-Borne Wi-Fi Project

Newsy (Nov. 21, 2014) — In a blog post, Google said its balloons have traveled 3 million kilometers since the start of Project Loon. Video provided by Newsy
Powered by NewsLook.com
Is Nintendo Making A Comeback With 'Super Smash Bros.'?

Is Nintendo Making A Comeback With 'Super Smash Bros.'?

Newsy (Nov. 21, 2014) — Nintendo released new "Super Smash Bros." Friday, and it's getting great reviews. Could this mean a comeback for the gaming company? Video provided by Newsy
Powered by NewsLook.com
NSA Director: China Can Damage US Power Grid

NSA Director: China Can Damage US Power Grid

AP (Nov. 20, 2014) — China and "one or two" other countries are capable of mounting cyberattacks that would shut down the electric grid and other critical systems in parts of the United States, according to Adm. Michael Rogers, director of the National Security Agency and hea 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