Neutral-atom qubits
Grids of atoms held by laser tweezers — flexible and fast-scaling.
Neutral-atom computers arrange individual (uncharged) atoms in configurable 2D/3D grids using tightly focused lasers called optical tweezers. They scale to hundreds of qubits with flexible geometry and can run in both analog (simulation) and digital (gate) modes.
In plain terms
Think of a pegboard where each peg is a single atom, placed by a laser 'tweezer'. You can rearrange the pattern for the problem at hand, then use lasers to make neighbouring atoms interact.
How it works
Optical tweezers trap neutral atoms (often rubidium or ytterbium) in arrays that can be reconfigured on the fly. The qubit lives in the atom's internal states.
Interactions use Rydberg states — atoms briefly excited to be huge and strongly interacting — enabling multi-qubit gates and flexible connectivity.
The same identical-atom advantage as ions, plus larger arrays; error correction and fast high-fidelity gates are the active frontier.
The problem it solves
Neutral atoms offer a fast route to many qubits with reconfigurable connectivity — attractive for quantum simulation and, increasingly, gate-based fault tolerance.
- +Scales to hundreds of qubits with flexible layouts.
- +Analog and digital modes; strong for simulation.
- +Identical atoms; no fabrication variation.
- –Gate fidelity and error correction are earlier-stage than ions.
- –Complex laser systems; atom loss to manage.
Companies building this
European neutral-atom leader deploying analog+digital systems into HPC centres.
Commercialized large neutral-atom arrays for simulation, available on the cloud.
Pushed neutral-atom qubit counts past 1,000 — a scaling milestone.