Quantum teleportation: The express lane for quantum data traffic

Physicists have shown that levitating can be used to avoid the loss of communication channels on the quantum level.

The team, including researchers from the Centre for Quantum Dynamics, have highlighted the issues around inherent loss that occurs across every form of communication channel and discovered a mechanism that can reduce that loss.

Professor Pryde, Slussarenko, Kocsis, and Weston are part of a group that says the finding is an important step towards implementing quantum internet.

Dr. Slussarenko said that this study was the first to show an error reduction method that improved the performance of a channel.

He said that they looked at the raw data transmitted via our channel and could see a better signal with our method.

In our experiment, we first sent a photon through the loss, which is not carrying any useful information, so losing it was not a big problem.

We could correct for the effects of loss via a device called noiseless linear amplifier.

Sometimes it fails, but it can recover the lost quantum state.

Once the recovery succeeds, we use a purely quantum protocol called quantum state teleportation to get the information we wanted to transmit into the corrected carrier.

The study shows how a quantum communication can transmit data in an extremely secure and safe way so that it is impossible to access by a third party.

If we want to implement a global quantum network, photon loss becomes an issue because it is unavoidable.

A key ingredient of the long-distance communication network is a quantum relay.

If a photon that carries information is lost, the information it carries is gone forever.

A working long-distance quantum communication channel needs a mechanism to reduce information loss, which we did in our experiment.

Dr. Slussarenko said that the next step would be to reduce the errors to a level where the team could implement long-distance quantum cryptography, and test the method using real-life optical infrastructure, such as those used for fiber-based internet.

The study has been published in Nature Communications.

More information: Sergei Slussarenko et al, Quantum channel correction outperforming direct transmission, Nature Communications (2022). DOI: 10.1038/s41467-022-29376-4 Journal information: Nature Communications Citation: Quantum teleportation: The express lane for quantum data traffic (2022, April 12) retrieved 12 April 2022 from https://phys.org/news/2022-04-quantum-teleportation-lane-traffic.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.