Microsoft Achieves 20-Second Qubit Lifetime, Switching Speed Improved 1,000 Times

en.Wedoany.com Reported - At the annual Build conference, Microsoft announced improvements to its Majorana qubit design, achieving a 20-second parity lifetime and a switching speed 1,000 times faster than before. This design has been integrated into the next-generation chip, Majorana 2. The key parameter, topological energy gap, has been improved by more than two times compared to the previous design. The improvement was achieved through a material stack containing Lead (Pb) and Antimony (Sb), with the manufacturing process completed using a process designed by agentic AI.

Microsoft is still characterizing this new design, and preliminary tests indicate that other performance metrics of the device are expected to improve significantly. Microsoft now anticipates having a scalable topological quantum computer by 2029, which is much earlier than originally expected.

Related technical details have been disclosed in three materials: the blog post "Majorana 2—Microsoft’s scalable quantum processor with reliable, long-lasting qubits," the blog post "How Microsoft’s new quantum chip was made 1000x more reliable with the help of Microsoft Discovery’s agentic AI," and the technical paper "20 Second Parity Lifetime in an InAs-Pb Tetron Device."

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