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Microsoft quantum computing ‘breakthrough’ faces fresh challenge

Analysis pokes holes in protocol that underpins Microsoft’s claim to have created the first topological qubits.
  1. Dan Garisto
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A physicist has cast doubt on a test that underlies a high-profile claim by Microsoft to have created the first ‘topological qubits’, a long-sought goal of the company’s quantum-computing effort. The critique comes amid mounting speculation about the validity of Microsoft’s claim.

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doi: https://doi.org/10.1038/d41586-025-00683-2

References

  1. Microsoft Azure Quantum. Nature 638, 651–655 (2025).

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  2. Legg, H. F. Preprint at arXiv https://doi.org/10.48550/arXiv.2502.19560 (2025).

  3. Aghaee, M. et al. Phys. Rev. B 107, 245423 (2024).

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  4. Hess, R., Legg, H. F., Loss, D. & Klinovaja, J. Phys. Rev. Lett. 130, 207001 (2023).

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Competing Interests

Disclosure: The author of this story is related to Robert Garisto, the chief editor of Physical Review Letters, which is a sister journal of Physical Review B. The two had no contact about this story.

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