Scientists Question Microsoft Majorana 2 Quantum Chip Claims

Microsoft unveiled its Majorana 2 quantum chip in early June 2026, claiming the upgraded device extended quantum state lifetime from milliseconds to up to a minute — a milestone the company says puts it on track for practical quantum computers by 2029. Leading physicists who reviewed the work say the data does not support the headline claims.

What Microsoft Claims

The Majorana 2 chip follows the Majorana 1 announced in February 2025. Microsoft argues it achieved a topological qubit — a type of quantum state inherently more stable and error-resistant than conventional approaches. The company says this architecture is key to building fault-tolerant quantum computers at scale.

Where Scientists Disagree

Academic physicists are unconvinced. Physicist Henry Legg stated that nothing in the presented data proves the existence of a topological qubit in these devices. Sergey Frolov of the University of Pittsburgh said the Microsoft Quantum project follows a sustained pattern of unreliable claims. Reviewers also noted there is no evidence in the new paper that the device actually functions as a working qubit.

A History of Controversy

Microsoft retracted a high-profile Nature paper in 2021 after outside experts found that data could have come from material imperfections rather than the topological phenomenon the company had claimed. The new doubts echo that episode and raise questions about Microsoft's quantum roadmap.

Industry Stakes

Quantum computing is a potential breakthrough technology for drug discovery, cryptography, and financial modeling. Microsoft, Google, IBM and numerous startups are racing to demonstrate practical quantum advantage. Independent scientific verification remains the key benchmark separating genuine progress from overstated results.