# Russian team runs three-qubit CCZ gate in one 65 ns pulse with 99.39% fidelity on fluxonium processor

- Published: 2026-11-10 21:49 UTC
- Section: Digital & Computing › Quantum technology
- Tags: three-qubit processor, CCZ gate, 99.39% fidelity, fluxonium qubits, transmon coupler, single microwave pulse, superconducting qubits, MISIS University, Russian Quantum Center
- URL: https://realtech.media/news/rt-dbf8555d674dd404f75a52f2_russian_team_runs/

**A prototype three-qubit superconducting processor performs CCZ in one pulse instead of the usual eight two-qubit operations, which reduces accumulated error.**

![Russian team runs three-qubit CCZ gate in one 65 ns pulse with 99.39% fidelity on fluxonium processor](https://realtech.media/media/2026/11/48d91eba88d5dab4.jpg)
*ixbt.com*

Russian researchers have built a three-qubit quantum processor that performs operations with 99.39% fidelity, ixbt.com reports. The result is described as a world record for gates of this type [1]. The complex three-qubit CCZ operation is executed by a single microwave pulse lasting 65 nanoseconds rather than a sequence of several transformations [1].

CCZ is usually implemented with eight two-qubit operations. Each extra step raises the probability of error, so reducing their number improves the accuracy of quantum computation. According to the developers, a conventional implementation would need two-qubit gates with about 99.94% fidelity each to reach comparable accuracy. Reaching that level on superconducting devices is still difficult [1].

The processor module was created by researchers at MISIS University, the Russian Quantum Center, INME RAS and MIPT. It consists of three superconducting fluxonium qubits coupled through a shared transmon element. The operation is controlled by a single pulse whose parameters are tuned with standard calibration methods [1].

The scientists consider the architecture suitable for building larger quantum processors. They plan to adapt it to two-dimensional layouts while keeping the mechanisms that suppress unwanted interactions between qubits [1].

## Sources

1. [ixbt.com](https://www.ixbt.com/news/2026/11/10/tri-kubita-odin-impuls-rossiiskie-ucenye-dobilis-rekordnoi-tocnosti-kvantovyx-vycislenii.html)

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Source: RealTech, realtech.media — https://realtech.media/news/rt-dbf8555d674dd404f75a52f2_russian_team_runs/