Majorana Zero Mode

A Majorana zero mode is a quasiparticle excitation that acts as its own antiparticle, a state predicted to appear at the ends of certain superconducting nanowires and in other engineered materials. Two Majorana zero modes combine into a single fermionic state whose 0 and 1 configurations live in two physically separated places at once, which is the proposed basis for a topological qubit. Because the information is stored non-locally, in how the two modes are paired rather than in any one spot, local noise that would flip an ordinary qubit cannot easily disturb it, which is the entire appeal of topological quantum computing. The difficulty is experimental: for years the field has debated whether measured signatures are genuine Majorana modes or look-alike states, several prominent claims were later retracted, and as of 2026 no group has built a working topological qubit from them. Microsoft is the main commercial effort pursuing this path.