Computing · November 2025

448-atom fault-tolerant architecture

Neutral atoms combine all the parts of an error-corrected computer.

Harvard, MIT and QuEra reported in Nature a 448-qubit rubidium-atom system that brought together every element of fault-tolerant computing with errors below threshold, making neutral atoms a leading route to scale.

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

Quantum error correction 1995
Laser 1960

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