Microsoft presents new Majorana qubit data at the APS Global Physics Summit; outside physicists remain skeptical

Microsoft Quantum/Majorana topological qubits

At the APS Global Physics Summit, Microsoft's Chetan Nayak showed new data on Majorana-based topological qubits, but independent physicists said the evidence does not yet prove a controllable topological qubit. One argued the test Microsoft uses can give false positives.

• Nayak presented qubit operations on a device with four Majorana zero modes (two nanowires hosting MZMs each).
• Physicists Jelena Klinovaja and Henry Legg expressed skepticism; Legg stated any 2025 topological qubit claim is "selling a fairy tale."
• Nature editorial noted results do not yet represent evidence for Majorana zero modes in the reported devices.