Researchers have designed a new kind of transmitter-receiver which could send entangled photons over an optical fibre.
The concept could see a future “quantum internet” merged with current telecommunications technologies.
Quantum internet could see the strange effect of quantum entanglement be used to make uncrackable encryption. Not even quantum computers – themselves still in the development phase – would be able to crack the security of a quantum internet. ...
This technique combines a mixture of photon frequencies (colours) with the entangled information to be unmixed at the other end.
But the authors of the new study say, “more resource-efficient approaches are required”. ...
“We can change the colour of a laser pulse with a high-speed electrical signal so that it matches the colour of the entangled photons,” explains first author Philip Rübeling, also from the Leibniz University Hannover. “This effect enables us to combine laser pulses and entangled photons of the same colour in an optical fibre and separate them again.”
This method could see today’s internet merged with the quantum internet. ...
See the full story here: https://cosmosmagazine.com/technology/internet/quantum-internet-transmitter-optical-fibre