Close

Search

Search Menu
Photonics Media Photonics Buyers' Guide Photonics Spectra BioPhotonics EuroPhotonics Vision Spectra Photonics Showcase Photonics ProdSpec Photonics Handbook

All-fiber Quantum Logic

Facebook Twitter LinkedIn Email Comments
BRISTOL, UK, May 29, 2009 – The only quantum technology in practical use today is quantum cryptography and it is currently limited in the distance over which secure communication may occur. However, a team of physicists and engineers have now demonstrated all-fiber quantum logic, where single photons are generated and used to perform the controlled-NOT quantum logic gate in optical fibers with high fidelity.

Photonic-Crystal-Fiber.jpg
An image of a photonic crystal fiber, courtesy of Alex Clark.

More sophisticated quantum networks will require multiple nodes with the ability to implement small-scale quantum processing in order to increase the range of quantum communications. Such networks will rely on optical fiber links, making fiber-based photon generation and information processing of key technological importance.

Jeremy O'Brien, professor of Physics and Electrical Engineering at Bristol University and colleagues, have shown it is possible for a high-fidelity fiber controlled-NOT gate to operate with fiber heralded single-photon sources.

"On the basis of a simple model we are able to conclude that imperfections are primarily due to the photon sources, meaning that the gate itself works with very high fidelity," said O’Brien. "Such all fiber quantum information processing will likely have important applications in future quantum networks."

All-fiber quantum information processing could be used in less mature quantum technologies such as computing, communication and advanced measurement, as well as in the fundamental science of quantum optics.

For more information, visit: www.bristol.ac.uk

Photonics.com
May 2009
GLOSSARY
photonics
The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
quantum optics
The area of optics in which quantum theory is used to describe light in discrete units or "quanta" of energy known as photons. First observed by Albert Einstein's photoelectric effect, this particle description of light is the foundation for describing the transfer of energy (i.e. absorption and emission) in light matter interaction.
all-fiber quantum logicCommunicationscontrolled-not quantum logicfiber opticsNews & Featuresoptical fibersopticsphotonicsquantum communicationsquantum cryptographyquantum networksquantum opticssingle photonUniversity of Bristol

Comments
back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2020 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA, [email protected]

Photonics Media, Laurin Publishing
x We deliver – right to your inbox. Subscribe FREE to our newsletters.
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.