Computing · November 2025

Quantinuum Helios

98 trapped-ion qubits and 48 error-corrected logical qubits.

Quantinuum's Helios launched commercially with 98 barium-ion qubits and 99.921% two-qubit fidelity. It ran 48 error-corrected and 94 error-detected logical qubits.

See it in the living tree Wikipedia Source

Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 2

Trapped-ion quantum gate 1995
Quantum error correction 1995

Related measurements

The dashed line marks when it first worked.

Selected gate-model quantum processors Latest: 1.12k physical qubits (2023) Source: Wikipedia: Timeline of quantum computing and communication; Wikipedia: List of quantum processors