Research design into hybrid quantum network built of different nodes from Admin's blog

Quantum network will provide billions of people secure and fast connection. Researchers have yet to incorporate into it nodes of different types to make a bright quantum future the case.


And here we have a breakthrough, one in building a hybrid quantum system. Researchers managed to pass a qubit, a unit of quantum information, from one node based on cooled gas to another based on a rare-earth doped crystal. This is a sure sign of progress, so let's see how the work can be advanced further to consumer-oriented devices.


In the study researchers report they also changed the wavelength of a carrier of a qubit, i.e. a photon after generating it to fit into a conventional optical fiber used to link the two nodes. Upon receiving the wavelength was changed second time to match that of the receiving crystal itself.


Finally the team reports successful encoding.


"We demonstrate that quantum correlations between a photon and a single collective spin excitation in the cold atomic ensemble can be transferred to the solid-state system.


"We also show that single-photon time-bin qubits generated in the cold atomic ensemble can be converted, stored and retrieved from the crystal with a conditional qubit fidelity of more than 85 per cent.


"Our results open up the prospect of optically connecting quantum nodes with different capabilities and represent an important step towards the realization of large-scale hybrid quantum networks.

"Photonic quantum state transfer between a cold atomic gas and a crystal" read paper


What is the next step? As we are at ReptileCoin community going to provide our users with advanced quantum networks we need more research in this field, especially we aim to find ways of reducing costs for mass user. Therefore work to be done includes surveying and comparing different types of quantum nodes available. Looking at them in the perspective of being used as components of a network to come is to be in the focus of research we need and are going to support. It is being a part of a bigger network that might have impact on weighing pros and cons of different physical platforms representing nodes.



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