QuEra Computing

QuEra, founded by Harvard and MIT physicists, builds quantum computers from single rubidium atoms held in place by focused laser beams. Atoms can be moved around during a calculation, so any qubit can be brought next to any other. It offers an analog machine, Aquila, on Amazon's cloud and a gate-based machine, Gemini, installed on site in Japan. Much of its published work with academic partners focuses on error-corrected 'logical' qubits, and it now plans a fault-tolerant system called Libra for 2028.

private company (venture-backed; investors include SoftBank Vision Fund, Google Quantum AI and NVIDIA's NVentures) · Based in United States · Since 2018 · Facts checked 27 October 2026

Where it ranks this month

Best place in each race, from QubitBenchmark release 2026-11.1.

All rankings →

Most accurate#4Harvard–MIT rubidium atom array, 99.54% Error-corrected qubits–No ranked result Most qubits–No ranked result Fastest–No ranked result Use it today–No ranked result

Machines

Machine	Physical qubits	Introduced	How to use it
Aquila (analog)	256	2022	Amazon Braket
Gemini (gate-based)	260	2025	on-premises (first at AIST, Japan); hardware-level interface available on request
Libra (announced, fault-tolerant)	–	2026	not publicly available (planned for Amazon Braket in 2028)

Qubit counts as the company reports them. Our rankings use QubitBenchmark's checked results instead.

Promised vs delivered

What QuEra Computing has said it would build, and what happened.

All roadmaps →

Milestone	Target	Status	Why we say so
Gen-1 error-corrected system: 10 logical qubits, >256 physical, transversal gates	2024	Slipped	QuEra's own system list dates its first gate-based machine (Gemini, 260 physical qubits) to 2025; the first unit was installed at AIST, Japan, in May 2025. Source
Gen-2 system: 30 logical qubits, >3,000 physical, magic state distillation	2025	Slipped	Logical magic state distillation was shown on Gemini (Nature, July 2025), but QuEra's current system list has no >3,000-physical-qubit product; its largest available machine is the 260-qubit Gemini. Source
Gen-3 system: 100 logical qubits, >10,000 physical	2026	Slipped	QuEra's current roadmap places its first >10,000-physical-qubit system (Libra) in 2028. Source
Libra: megaquop-class fault-tolerant system, >256 logical qubits, 1e-6 logical error rate, on Amazon Braket	2028	On track (company says)	Announced June 2026 and repeated on QuEra's site in October 2026; nothing to judge yet. Source
Gigaquop-class system: >1,000 logical qubits, >20,000 physical, 1e-9 logical error rate	2028-2029 (initial use at QuEra)	On track (company says)	Announced June 2026; long-range target. Source

Recent claims, and how far the evidence has got

Peer-reviewed First magic state distillation carried out entirely on logical (error-corrected) qubits, run on Gemini with distance-3 and distance-5 colour codes (with Harvard and MIT) Source
Peer-reviewed Integrated fault-tolerant architecture on up to 448 neutral-atom qubits, operating below the error-correction threshold (Harvard-led, with MIT and QuEra) Source

In other organisations' rankings

Where QuEra Computing appears in other published rankings and lists. They don't change ours.

All of them →

The Quantum Index Report 2026, MIT Initiative on the Digital Economy (MIT Sloan), in collaboration with Accenture (2026-10). Transparent, sourced and openly licensed data, but it measures activity (patents, funding, press releases) rather than how well the machines perform.
CB Insights ESP matrices: Quantum computer makers (neutral atoms, photonics, silicon qubit, superconducting circuits, trapped ions), CB Insights (2026). Based on market and business signals, not machine performance. Vendors can brief CB Insights, and most placements are hidden behind a subscription.
Quantum Benchmarking Initiative: Stage B Selection, DARPA (US Defense Advanced Research Projects Agency) (2025-11-06). An official list of who advanced, not a ranking; it partly rests on plans and roadmaps, and Stage C has since narrowed it (see darpa-qbi-stage-c-2026).

Compare

QuEra vs Atom Computing

Sources

QuEra Computing Inc., Wikipedia
QuEra Computing roadmap for advanced error-corrected quantum computers, The Quantum Insider, 9 January 2024
QuEra Installs First Quantum Computer Outside Its Lab, The Quantum Insider, 29 May 2025
QuEra, Harvard and MIT Researchers Demonstrate Logical-Level Magic State Distillation on a Neutral-Atom Quantum Computer, QuEra Computing, 14 July 2025
Harvard and collaborators demonstrate scalable fault-tolerant architecture with 448 neutral-atom qubits, Quantum Computing Report, 23 November 2025
QuEra Announces 2028 Fault-Tolerant Quantum Computer and Expanded Multi-Year Strategic Collaboration with AWS, The Quantum Insider, 15 June 2026
QuEra Unveils Gigaquop-Class Fault-Tolerant Roadmap and Invites Organizations to Co-Design Quantum Applications, The Quantum Insider, 25 June 2026
Gemini-Class Gate-Model Quantum Computer, QuEra Computing
Official Information About QuEra.com, QuEra Computing