Microsoft’s next-gen quantum chip cuts timeline to useful quantum computing

Microsoft claimed last year that it had made a key breakthrough in quantum computing with Majorana 1, the company’s first quantum processor. While physicists were immediately skeptical of Microsoft’s claims, the software giant is announcing Majorana 2 today, the next generation of its topological quantum chip. Majorana 2 contains qubits, a unit of information in quantum computing much like the binary bits that computers use today, that are 1,000 times more reliable, according to Microsoft. It’s a milestone that helps make quantum computing more reliable, thanks to the use of a new material stack and some help from Microsoft Discovery’s agentic AI. “To create Majorana 2, the Microsoft Quantum team improved Majorana 1’s material stack to create a more stable topological phase,” explains Chetan Nayak, Microsoft technical fellow and corporate vice president of quantum hardware. “Majorana 2 replaces Majorana 1’s superconductor, aluminum, with lead, and also updates the semiconductor active region to a combination of indium arsenide and indium arsenide antimonide.” The improved materials mean better performance of qubits, according to Microsoft. “In the aluminum-based Majorana 1, qubit lifetimes were between one and 12 milliseconds, whereas in Majorana 2, the lifetimes exceed 20 seconds, representing more than 1,000x improvement in stability,” says Nayak. …