The first kusept-based quantum computer has been created in Russia

Scientists from the Russian Quantum Center have presented the country's first ion quantum computer based on seven—level quantum systems. The new architecture made it possible to create a processor with an equivalent information capacity of 72 qubits, which brings the development to the level of world scientific achievements. There are only a few teams in the world with comparable results. Maxim Ostras, Director General of the Russian Quantum Center, told Izvestia about this on December 29.

Unlike classical computers, where the minimum unit of information is a bit (0 or 1), quantum systems operate with qubits capable of being in a superposition of states. However, scaling is possible not only by increasing the number of qubits, but also by increasing their levels. Multilevel qubits are called qudits. In the presented processor based on 26 calcium ions, for the first time in Russia, seven—level qudits are implemented, capable of taking values from 0 to 6.

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To build the computer, the team led by Kirill Lakhmansky developed specialized laser systems, complex optical architecture, and improved control electronics and software as part of the national quantum project. During the control experiment, the researchers performed single-qubit and two-qubit operations on the new processor with an average accuracy of 99.92% and 96.5%, respectively.

"We showed the viability of the multilevel approach back in 2021, when the Russian Quantum Center for the first time implemented a two-qubit system equivalent to four qubits. In just four years, we have managed to increase the computing power many times and move to a prototype equivalent to 72 qubits," said Ostras.

In the near future, scientists plan to start integrating surface ion traps, which will ensure individual control of each ion and increase the accuracy of calculations.

Kirill Lakhmansky, the head of the scientific group, emphasized that the key advantage of the kusept processor is the ease of scaling: the power can be increased both by increasing the qubit levels and by increasing the number of ions. Early next year, it is planned to implement the MaxCut algorithm to solve the fundamental problem of combinatorial optimization, which is important for logistics, network design and statistical physics.

Earlier, on October 8, Science Daily reported on the creation of the first working quantum lie detector, the Bell test, developed by physicist John Bell. It was clarified that the device shows whether the quantum computer uses the real effects corresponding to it or imitates them.

All important news is on the Izvestia channel in the MAX messenger.