July 27, 2015

Quantum networks: Back and forth are not equal distances!

(July 27, 2015)  Quantum technology based on light (photons) has great potential for radically new information technology based on photonic circuits. Up to now, the photons in quantum photonic circuits have behaved in the same way whether they moved forward or backward in a photonic channel. This has limited the ability to control the photons and thus build complex circuits for photonic quantum computers. Now researchers from the Niels Bohr Institute have discovered a new type of photonic channels, where back and forth are not equal distances! Such a system has been a missing component for building quantum photonic circuits on a large scale. The results are published in the scientific journal, Nature Nanotechnology.

“The smallest component of light is a photon and photons are very well suited for carrying information. A quantum circuit based on photons could contain far more information than is possible with current computer technology and the information could not be intercepted en route. So we are working to shape the future quantum technology based on photonics,” explains Peter Lodahl, Professor and head of the research group Quantum Photonics at the Niels Bohr Institute at the University of Copenhagen.

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