Quantum error correction goes well beyond breakeven

Quantum computers need many hardware qubits tied together into one error-corrected logical qubit, and each step up in size should cut mistakes. Quantinuum says its Helios machine, which moves trapped ions around a ring with electric fields so lasers can entangle any pair, cuts some error measures by more than tenfold per step, well beyond the factor of two most demos reach.

Summary written with AI by HowTechMoves, based on reporting by Ars Technica.