Researchers from MISIS University, the Russian Quantum Center, INME RAS, and MIPT have developed a three-qubit quantum processor module. It utilizes three superconducting fluxonium qubits connected via a common transmon element to perform quantum operations.
The team successfully executed the CCZ gate, a fundamental three-qubit operation, using a single microwave pulse. This process takes 65 nanoseconds, which is significantly faster than the traditional method of decomposing the operation into eight two-qubit gates.
The new approach achieved a record-breaking accuracy of 99.39% to 99.4%. By reducing the number of steps required for complex operations, the researchers aim to minimize the accumulation of errors during quantum computations.
This architecture is designed to support the scaling of superconducting quantum processors. The module can be integrated into two-dimensional circuits while maintaining mechanisms to suppress unwanted interactions between elements.
The study was conducted as part of the Quantum Internet project under the Priority-2030 program, supported by the Russian Ministry of Science and Higher Education.
