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|Illustration: Søren Stobbe, NBI|
Increased information capacity
Control of the photons
“We have developed a photonic chip, which acts as a photon gun. The photonic chip consists of an extremely small crystal that is 10 microns wide (one micron is a thousandth of a millimetre) and is 160 nanometres thick (1 nanometre is a thousandth of a micron). Embedded in the middle of the chip is a light source, which is a so-called quantum dot.
“The photons can be sent over long distances via optical fibres, where they whiz through the fibres with very little loss. You could potentially build a network where the photons connect small quantum systems, which are then linked together into a quantum network — a quantum internet,” explains Peter Lodahl.