MessageToEagle.com

Quantum-Satellite Achievements - Race Still Continues!

4 March, 2013

Share this story:
Follow us:

MessageToEagle.com - In the last years, quantum theory has appeared in satellite communications offering answers for some of nowadays’ technical questions.

Although quantum computers are going to be the tools of the far future, there exist already algorithms to solve problems which are very difficult to be solved by traditional computers.

Last year, scientists reported a significant development towards future satellite-based quantum teleportation but race still continues.


Now, another group of scientists, Thomas Jennewein and Brendon Higgins from the Institute for Quantum Computing at the University of Waterloo, Canada, describe how a quantum space race is under way to create the world's first global quantum-communication network.

The field of quantum communication - the science of transmitting quantum states from one place to another - has received significant attention in the last few years owing to the discovery of quantum cryptography. Quantum cryptography exploits a unique property of single particles, such as photons: they can exist in two separate states - such as vertically polarized or horizontally polarized - or something in-between, known as a quantum superposition.

Upon measuring the state of a particle you instantly change this state, meaning an encryption key made of photons can be passed between two parties safe in the knowledge that if an eavesdropper intercepts it, this would be noticed.

Quantum cryptography has been described as a way of creating "unbreakable" messages and has attracted the attention of major technology companies, governments, banks and other security-focused clients.

The transmission of encryption keys over long distances still remains a significant challenge for scientists, however, as the intensity of signals tends to weaken as they travel further because photons get absorbed or scattered off molecules.

Up until now, the furthest that quantum-communication signals have been sent is a few hundred kilometres, which would realistically enable communication between just one or two cities.



There is one place, however, where scattering doesn't appear to happen - empty space. Jennewein and Higgins lead just one of several teams around the world looking to take advantage of this by pursuing the concept of a quantum satellite.

A signal travelling from a ground station on Earth to a satellite would spend most of its time in the empty vacuum of space - rather than in Earth's atmosphere, which is crowded with gas molecules - so the signal would travel a lot further without weakening.

A satellite orbiting at around 32000 km above Earth would act as a kind of relay between two ground stations in a way that allows them to establish a secure link by sharing an encryption key made of photons.

"With the prospect of global-scale quantum communications and fundamental quantum science within new, unexplored regimes, the next few years are sure to be exciting," Jennewein and Higgins write.

In addition to the basic mass and power of the satellite itself, the team led by Jennewein and Higgins has been studying the overall design features of the satellite and ground stations and has emphasized the need for them both to be precisely aligned so they can be certain that what they are measuring correctly corresponds to the photons that are prepared.

Institute of Physics (IOP).

© MessageToEagle.com

See also:
Geological Rift That Baffles Scientists Is Still Expanding

Follow MessageToEagle.com for the latest news on Facebook and Twitter !

Don't Miss Our Stories! Get Our Daily Email Newsletter

Enter your email address:


Once you have confirmed your email address, you will be subscribed to the newsletter.

Recommend this article:


Amazing Journey To The World's Largest Cave That Has A Jungle And Waterfalls Hidden Deep Inside!

We continue to look for amazing places on our planet and this is one of them. Son Doong is the name of the world's largest cave in the world. It is not only huge, but also a very beautiful place filled with wonders. It is almost like an alien world on Earth. What is truly fascinating is the jungle inside the cave...

Antarctic Ice Shelves Breaking Up Fast

Subscribe To Our Space, Astronomy, Astrophysics, Earth and Xenology News!

Grab the latest RSS feeds right to your reader, desktop or mobile phone.

Subscribe to RSS headline updates from:
Powered by FeedBurner

Go to - MAIN PAGE

Copyright © MessageToEagle.com All rights reserved.
Go to - MAIN PAGE


Get our top stories
Follow MessageToEagle.com

 Subscribe in a reader

Join Us On Facebook!

Other Popular Articles

Dangerous Fast and Furious - Birth Of Africa's New Ocean
The only places where mid-ocean ridges appear above sea level are Ethiopia and Iceland. Two new studies into the so-called “plumbing systems” that lie under volcanoes could bring scientists closer to predicting large eruptions and reveal new information about where magma is stored and how it moves through the geological plumbing network.


Incredible Images Show Giant Sinkhole In Sweden Keeps Expanding!

It looks like something taken straight from a horror movie. An enormous hole leading to hell, some would say. But this is not a movie. This is a real and dangerous phenomenon. New shocking images clearly show the enormous pit in Sweden is expanding...


6 Surprising Things Falling From The Sky

Stories of strange things falling from the sky date back a long time ago. Over the years, there have been many bizarre instances recorded when things have fallen from the skies that simply do not belong there. We have put together a list of some surprising things that fell from the heavens. These are things you certainly don't expect to fall down on you...

New Shocking Discovery Challenges The Origin Of Earth
Where did our planet come from? We already know that our Sun does not originate from M 67. A new surprising discovery is now forcing scientists to re-evaluate the origin of Earth.


Exploding Lakes - Horrifying Natural Phenomena

Exploding lakes are a terrible natural phenomena and very serious environmental problem.
These lakes are capable of killing thousands, even millions of people and animals living in the region...
Lake Nyos is an active crater lake that formed by an eruption about 5 centuries ago...

Antarctica's Mysterious Lake Untersee And Its Otherworldly Ecosystem
A research team has now returned to Lake Untersee to begin the first real studies of this incredible environment. This new high-quality image details the conical stromatolites that have formed on top of a boulder at a depth of about 20 meters, other cones can be seen populating the sloping bottom...

Solar Tornadoes As Wide As Five Earths Discovered
Solar tornadoes several times as wide as the Earth can be generated in the solar atmosphere, say researchers in the UK. "This is perhaps the first time that such a huge solar tornado is filmed by an imager. Previously much smaller solar tornadoes were found my SOHO satellite. But they were not filmed," says Dr. Xing Li, of Aberystwyth University.

Extreme Weather: Rare Supercell Thunderstorm Produces Monster Hailstone
Just recently scientists announced they found new evidence linking Earth's extreme weather to human-caused global warming. Now, the National Weather Service office in Honoulu in coordination with the State Climate Extremes Committee has confirmed that a rare supercell thunderstorm has produced new state hail size record.


Who Installed "This Object" At The Bottom Of The Ocean?
Extreme Life In Tough Environment Of Hot Earth Without Oxygen

Living Earth Simulator - Supercomputer Predicting The Future
In Douglas Adams book the Hitchhikers Guide to the Galaxy we encounter a machine called Deep Thought. It is the most powerful computer ever built. Deep Thought is capable of answering questions concerning life, the Universe, and simply everything. Now scientists are planning to create a similar machine. It is called the Living Earth Simulator (LES).

W3Counter