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In the Netherlands, the world’s first quantum Internet demonstrator

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In the laboratories, there have been a joint work of individual quantum “processors” – superconducting and other qubits – but for this network, it is also necessary to create intermediate nodes to provide agreed distributed work. This will be the basis of the quantum Internet, the first decisive step in the direction of which the scientists from the Netherlands did the other day.

Three-tier quantum network in the artist’s presentation. Image source: Matteo Pompili for QUTECH

Researchers within the laboratory created three quantum nodes – relatively speaking, two single-processor quantum computers and one quantum router. The router contained a second qubit playing the role of quantum memory. Quantum confusion was set sequentially between the cube of the first computer and the router cube, after which it was remembered in the router-memory, then the router cube was confused with the cube of the second computer and, finally, the confusion between the cubes of both computers was performed. Animation below gives an exemplary view of the operation of quantum nodes.

An important feature of the experiment was the fact that after establishing directly confusion between two quantum “computers”, the network was able to generate the “flag” of the state. This means that the basis for creating protocols and scaling the quantum Internet. “After creating [confusion], we were able to save the emerging confused states, protecting them from noise,” said Sophie Hermans researchers. – This means that in principle we can use these states for quantum distribution of keys, quantum calculations or any other subsequent quantum protocol. “

The work reports were published in the science edition. The study was conducted at the QUTECH Center established by Delft University of Technology (TU DELFT) and the Dutch Organization of Applied Scientific Research (TNO). We also remind that Intel is actively working with QUTECH, although in this experiment, most likely, Intel equipment was not used (the company is not engaged in cubes on photon traps, and optical quits were used in the experiment).

Авторы исследования. Источник изображения: Marieke de Lorijn for QuTech

The authors of the study. Image source: Marieke De Lorijn for QUTECH

In the laboratory, researchers will focus on adding more quantum bits in their three-core network, as well as on the addition of higher-level software and hardware levels. “After all high-level controls and interface levels for the network are developed, anyone can write and run the network application without having to understand how lasers and cryostats work. This is the ultimate goal, “said Matteo Pompili (Matteo Pompili).

Add, the first distributed urban quantum network Internet in Amsterdam will be built next year. The project started a little over a year ago, but this is another story.

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