Exhibit highlights advances in quantum communication and computing

Jul 03, 2013

Researchers from the Cambridge Research Laboratory of Toshiba Research Europe Limited and the Cavendish Laboratory of the University of Cambridge will today present the world's most secure chat and video conferencing network at the Royal Society Summer Science Exhibition in London. It uses quantum physics to automatically detect tapping of the network and alert users of any potential threat.

Thanks to the increasing use of internet services and commerce, more and more of our personal details, such as , bank details and health records are shared over . Unfortunately optical networks can be spied upon, leaving our digital information vulnerable to theft and misuse.

To prevent information theft the Cambridge team has devised a system that sends encoded (single photons) along with the data on an . The laws of dictate that these particles cannot be intercepted without disturbing their encoding in a way that can be detected. This is used by the communications system to alert users of any unwelcome intrusion on the network. The exhibit at the Royal Society will demonstrate the ease with which information on an optical fibre can be extracted and how this can be detected and prevented using the new technology.

Commenting on the research, Dr Andrew Shields, Assistant Managing Director of Toshiba Research Europe Ltd, said "Over the past year we have developed techniques to send data and quantum signals on the same fibre and demonstrated its viability in the controlled environment of the lab. The Summer Science Exhibition will be the first demonstration of this technology in the real world. Users will be able to send quantum secure chat messages and video conference to one-another."

This is just one of a number of that will be demonstrated at the Royal Society Summer Science Exhibition. Visitors will be able to test if they can see a single photon and compete against the Toshiba single photon counter - the most sensitive light detector known. They will also be able to generate and image single photons using quantum light emitting diodes developed by the team.

The exhibition will discuss the first electrically-powered quantum teleporter, also developed by the Cambridge team. Quantum teleportation is a technique for moving quantum information between different locations without its physical transfer through space. It uses pairs of light particles in the two locations which possess 'quantum entanglement', giving them strangely interconnected properties although they are far apart. By interacting one of the two entangled photons with an input photon, its encoded state can be teleported onto the other photon in the entangled pair, even if it is in a distant location. The technology is important to extend the range of secure communication and for moving information around in a quantum computer.

Explore further: Physicists discuss quantum pigeonhole principle

More information: sse.royalsociety.org/2013/

add to favorites email to friend print save as pdf

Related Stories

Quantum cryptography goes maintream

Dec 05, 2012

(Phys.org)—Researchers from Toshiba and the Department of Engineering have perfected a technique that offers a less expensive way to ensure the security of high-speed fibre-optic cables, protecting communication ...

Into the quantum internet at the speed of light

Feb 04, 2013

Not only do optical fibers transmit information every day around the world at the speed of light, but they can also be harnessed for the transport of quantum information. In the current issue of Nature Ph ...

Efficient and tunable interface for quantum networks

May 23, 2012

(Phys.org) -- Quantum computers may someday revolutionize the information world. But in order for quantum computers at distant locations to communicate with one another, they have to be linked together in ...

Hi-fi single photons

Oct 04, 2012

Many quantum technologies—such as cryptography, quantum computing and quantum networks—hinge on the use of single photons. While she was at the Kastler Brossel Laboratory (affiliated with the Pierre and Marie Curie University, ...

Recommended for you

Physicists discuss quantum pigeonhole principle

Jul 26, 2014

The pigeonhole principle: "If you put three pigeons in two pigeonholes at least two of the pigeons end up in the same hole." So where's the argument? Physicists say there is an important argument. While the ...

Unleashing the power of quantum dot triplets

Jul 24, 2014

Quantum computers have yet to materialise. Yet, scientists are making progress in devising suitable means of making such computers faster. One such approach relies on quantum dots—a kind of artificial atom, ...

Exotic state of matter propels quantum computing theory

Jul 23, 2014

So far it exists mainly in theory, but if invented, the large-scale quantum computer would change computing forever. Rather than the classical data-encoding method using binary digits, a quantum computer would process information ...

Quantum leap in lasers brightens future for quantum computing

Jul 22, 2014

Dartmouth scientists and their colleagues have devised a breakthrough laser that uses a single artificial atom to generate and emit particles of light. The laser may play a crucial role in the development of quantum computers, ...

Boosting the force of empty space

Jul 22, 2014

Vacuum fluctuations may be among the most counter-intuitive phenomena of quantum physics. Theorists from the Weizmann Institute (Rehovot, Israel) and the Vienna University of Technology propose a way to amplify ...

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

vacuum-mechanics
1 / 5 (3) Jul 03, 2013
The exhibition will discuss the first electrically-powered quantum teleporter, also developed by the Cambridge team. Quantum teleportation is a technique for moving quantum information between different locations without its physical transfer through space. It uses pairs of light particles in the two locations which possess 'quantum entanglement', giving them strangely interconnected properties although they are far apart. By interacting one of the two entangled photons with an input photon, its encoded state can be teleported onto the other photon in the entangled pair, even if it is in a distant location...

Even quantum mechanics is mysterious, it is not a magic; it is physics (science of the nature), and this may help some .…
http://www.vacuum...17〈=en