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Russia Launches Technology for Advanced Superconducting Quantum Computer Chips

27 August 2026
Researchers from Bauman Moscow State Technical University's "Quantum Park" and the Federal State Unitary Enterprise "VNIIA" have developed a technology for producing superconducting integrated circuits based on tantalum. According to the developers, the new approach will improve the performance of components for quantum computers by more than a factor of ten. The first shipments of quantum coprocessors built on the tantalum platform are expected in autumn 2026.

Tantalum offers significantly greater resistance to acids and other aggressive environments compared to aluminum. This allows for more intensive processing of components and more efficient removal of atomic contaminants and oxides from their surfaces, which can degrade qubit performance. In addition, natural tantalum oxide contains fewer defects than aluminum oxide, contributing to longer retention of quantum information.

The researchers confirmed the viability of the new technology using tantalum microwave resonators. Their quality factor—a measure of the ability to preserve quantum information—exceeded 10 million in single-photon mode. According to the Russian scientists' estimates, this is among the best results in the world; comparable figures had previously only been achieved by Princeton University and the Belgian nanotechnology center IMEC.

One of the key challenges in developing the technology was obtaining the required phase of tantalum—superconducting circuits require high-purity alpha-tantalum. To achieve this, the specialists conducted over 1,000 experiments and examined wafers using transmission microscopy with atomic resolution. This approach made it possible to identify subnanometer features of the alpha-tantalum structure on silicon that cannot be detected using conventional analytical methods.

Photo credit: Evgeny Ziky
Sources: Bauman Moscow State Technical University, IXBT.COM

27 August 2026

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