Old doubts linger, yet new Microsoft quantum chip raises the stakes

Microsoft's Majorana quantum chips spark debate over claimed topological qubits and lessons from past announcements.

In February, the Microsoft Quantum research group announced a new kind of computer processor called Majorana 1. According to the tech giant, the processor contained the world’s first topological qubits, built with a new material it called a ‘topocond... [6993 chars]