Dutch researchers have implemented the project of the first multisite quantum network.
First Steps to Building a Quantum Internetscientists did about 10 years ago by connecting two quantum devices with a direct physical communication channel. Until now, however, such systems have not had intermediate nodes (analogue routers), which are critical for a scalable network.
Now a team from TU Delft has unveiled a system that connects three quantum processors and supports key protocols. BesidesFor this, entangled qubits are used for the first time in the created network.
The researchers' project iselementary quantum network of three nodes within one room. However, unlike previous versions, it has two channels connected by an intermediate node, which establishes entangled connections with the other two and has one additional qubit to store previously generated information during the process of establishing a new connection.
The team also developed key baselinesprotocols for storing entangled states and protecting them from interference. Such a system makes it possible to test equipment for the quantum Internet. Scientists are currently working on increasing the number of nodes and adding software and hardware protocols.
We also previously reported on the first successful controlled transfer of light stored in a quantum memory device.
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