The Leibniz University Hannover researchers have designed a novel “transmitter and receiver” approach for sending entangled photons across optical fibers.
This quantum internet carries information using light particles known as photons, which are bound together in an unusual quantum state known as entanglement. Interestingly, this technique promises impenetrable security in computers.
“We also want to continue using optical fibers for conventional data transmission. Our research is an important step to combine the conventional Internet with the quantum Internet,” Kues added. “We can change the color of a laser pulse with a high-speed electrical signal so that it matches the color of the entangled photons. This effect enables us to combine laser pulses and entangled photons of the same color in an optical fiber and separate them again,” explained Philip Rübeling, a doctoral student at the Institute of Photonics.
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