Microsoft to Have Scalable Quantum Computer by 2029

Microsoft has pulled forward its target date for building a practical quantum computer from 2033 to 2029, crediting a major jump in chip performance. Zulfi Alam, Microsoft’s VP for quantum, announced the new target last week alongside the launch of Majorana 2, the follow-on to Majorana 1. 

Majorana 1 was released in early 2025, and Majorana 2 builds on it as Microsoft edges toward hardware that outstrips conventional machines. A practical quantum machine would tackle classes of problems that conventional computers cannot crack within any useful timeframe. 

Majorana 2 qubits hold their state for about 20 seconds, roughly 1,000 times longer than its predecessor. Keeping qubits stable is a core challenge because they are inherently fragile and easily knocked off course by their surroundings. Any disruption corrupts the calculation, and fixing that corruption draws on time and processing capacity that reduce the computer’s overall usefulness. 

Sustained qubit stability has been one of the most stubborn barriers between prototype hardware and a genuinely deployable machine. The giant tech company favors an approach that centers on topological qubits, a design intended to make stability a property of the hardware itself rather than something managed externally. 

The basic idea is that the architecture physically protects the qubit, reducing the need to catch and correct errors after they have already occurred. Being newer than rival approaches, topological qubits leave Microsoft trailing other quantum hardware developers on most current benchmarks. 

Several competing hardware strategies are in play across the industry, each suited to different use cases and challenges. However, Microsoft still hasn’t presented experimental data for outside review, leaving DARPA as the sole validator. 

Microsoft says the arrangement protects proprietary information, but researchers who see independent replication as fundamental to scientific credibility have pushed back. It means the company’s claims cannot be assessed the way conventional published research can. Peer-reviewed publication is the normal route for results of this significance, allowing other laboratories to attempt reproduction. 

Alam described the generational leap as a fundamental shift in capability, not just an incremental gain. If the 2029 target proves accurate, it would compress what Microsoft itself recently described as a decade-long timeline by roughly four years. 

Getting there requires progress across multiple layers of the technology, with 2029 contingent on Majorana 2’s gains holding. Concrete deployment timelines for quantum computers have been rare in an industry long on promise and short on delivery. 

Microsoft’s news arrived in a week of broad quantum activity. Quantinuum, which emerged from Honeywell, listed on the Nasdaq and raised $1.68 billion. D-Wave Quantum Inc. (NYSE: QBTS) published a revised product roadmap, setting its sights on a commercial fault-tolerant quantum system by 2032, and JPMorgan Chase also announced it would team up with AMD and quantum company OQC on a research platform in London combining quantum computing and AI. 

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