Featured Research

from universities, journals, and other organizations

Quantum Channel Between Earth And Space? Firing Photons Makes Advance In Space Communication

Date:
March 29, 2008
Source:
New Journal of Physics
Summary:
For the first time, physicists have been able to identify individual returning photons after firing and reflecting them off of a space satellite in orbit almost 1,500 kilometers above the earth. The experiment has proven the possibility of constructing a quantum channel between Space and Earth.

GPS satellite. Researchers fired photons directly at the Japanese Ajisai Satellite (not in image) and were able to prove that the photons received back at the Matera ground-based station, in southern Italy, are the same as those originally emitted.
Credit: NOAA

For the first time, physicists have been able to identify individual returning photons after firing and reflecting them off of a space satellite in orbit almost 1,500 kilometres above the earth. The experiment has proven the possibility of constructing a quantum channel between Space and Earth.

Research in the New Journal of Physics, discusses the feasibility of building a completely secure channel for global communication, via satellites in space, all thanks to advances in quantum mechanics.

The research team, led by Paolo Villoresi and Cesare Barbieri from Padova University, Italy, has taken intricate steps to fire photons directly at the Japanese Ajisai Satellite. The researchers have been able to prove that the photons received back at the Matera ground-based station, in southern Italy, are the same as those originally emitted.

This news will be welcomed by communication companies, banks, and MI5-types worldwide as it paves the way for quantum-encrypted communication - the only form of communication that could ensure beyond any doubt that there are no eavesdroppers.

Until now, quantum-encrypted communication has only been proven possible at distances up to about 150 kilometres, either down optical fibres or via telescopes. When sent down optical fibres, photons are dissipated due to scattering and adsorption and, when using telescopes, photons are subject to interfering atmospheric conditions.

Anton Zeilinger, 2008 winner of the Institute of Physics’ premier award, the Newton Medal, was involved in the research. The team now believes that Space-to-Earth quantum communication is possible with available technology.

The scientists write, “We have achieved significant experimental results towards the realization of a quantum communication channel, as well as how to actually adapt an existing laser ranging facility for quantum communication.”

The team will now be furthering the research by making it possible to emit and receive quantum keys, uncrackable strings of 1s and 0s that enable quantum communication from an active sender in space. Very recently, the Italian Space Agency has funded the initial phase of this project.

The published version of the paper "Experimental verification of the feasibility of a quantum channel between Space and Earth" was published March 28, 2008 in the New Journal of Physics 10 033038. (http://www.iop.org/EJ/abstract/1367-2630/10/3/033038)


Story Source:

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


Cite This Page:

New Journal of Physics. "Quantum Channel Between Earth And Space? Firing Photons Makes Advance In Space Communication." ScienceDaily. ScienceDaily, 29 March 2008. <www.sciencedaily.com/releases/2008/03/080328101532.htm>.
New Journal of Physics. (2008, March 29). Quantum Channel Between Earth And Space? Firing Photons Makes Advance In Space Communication. ScienceDaily. Retrieved August 27, 2014 from www.sciencedaily.com/releases/2008/03/080328101532.htm
New Journal of Physics. "Quantum Channel Between Earth And Space? Firing Photons Makes Advance In Space Communication." ScienceDaily. www.sciencedaily.com/releases/2008/03/080328101532.htm (accessed August 27, 2014).

Share This




More Matter & Energy News

Wednesday, August 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Australian Airlines Relax Phone Ban Too

Australian Airlines Relax Phone Ban Too

Reuters - Business Video Online (Aug. 26, 2014) Qantas and Virgin say passengers can use their smartphones and tablets throughout flights after a regulator relaxed a ban on electronic devices during take-off and landing. As Hayley Platt reports the move comes as the two domestic rivals are expected to post annual net losses later this week. Video provided by Reuters
Powered by NewsLook.com
Hurricane Marie Brings Big Waves to California Coast

Hurricane Marie Brings Big Waves to California Coast

Reuters - US Online Video (Aug. 26, 2014) Huge waves generated by Hurricane Marie hit the Southern California coast. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Chinese Researchers Might Be Creating Supersonic Submarine

Chinese Researchers Might Be Creating Supersonic Submarine

Newsy (Aug. 26, 2014) Chinese researchers have expanded on Cold War-era tech and are closer to building a submarine that could reach the speed of sound. Video provided by Newsy
Powered by NewsLook.com
Breakingviews: India Coal Strained by Supreme Court Ruling

Breakingviews: India Coal Strained by Supreme Court Ruling

Reuters - Business Video Online (Aug. 26, 2014) An acute coal shortage is likely to be aggravated as India's supreme court declared government coal allocations illegal, says Breakingviews' Peter Thal Larsen. Video provided by Reuters
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