IonQ: The First Publicly Traded Quantum Company, and Why Its Qubit Count Matters for Quantum Resistant Timelines
IonQ: The Public Quantum Company
IonQ is the first publicly traded pure-play quantum computing company, having gone public via SPAC merger with dMY Technology Group III in 2021. Its trapped-ion hardware competes directly with Quantinuum. IonQ's strategic focus has been on commercialization and customer access to cloud-deployed quantum computing.
Hardware Timeline
- Forte (2022-23): 32 qubits. Available on AWS Braket cloud from June 2023.
- Forte Enterprise (September 2023): #AQ36 (36 algorithmic qubits), rack-mountable on-premise system.
The #AQ Metric
IonQ promotes an "algorithmic qubit" metric (#AQ) that accounts for error rates as well as qubit count. A system with #AQ36 can reliably execute an algorithm using 36 effective qubits without coherent errors dominating. This is a more honest metric than raw physical qubit count and is comparable to IBM's Quantum Volume.
DARPA QBI Participation
IonQ is one of 11 companies advanced to Stage B of DARPA's Quantum Benchmarking Initiative (November 2025).
KISTI Partnership (July 2025)
Korea Institute of Science and Technology Information (KISTI) named IonQ as the primary hardware partner for the Korean National Quantum Computing Center of Excellence. IonQ will deliver a 100-qubit trapped-ion system. This represents IonQ's largest single commercial deployment.
IonQ vs Quantinuum
| Metric | IonQ | Quantinuum |
|---|---|---|
| Physical qubit count (2026) | Forte Enterprise #AQ36 | H2 with 56 physical |
| Logical qubit demonstration | Not yet at Quantinuum's 12 | 12 (with Microsoft) |
| Commercial deployment | Cloud + on-prem (KISTI 100-qubit) | Cloud |
| Public company | Yes (NYSE) | No (private, Honeywell/CQC merger) |
Both pursue trapped-ion technology. Each has made slightly different technical and commercial bets.
Implications for PQC Timelines
- IonQ's commercial deployment to Korea (100-qubit target) is a real scale-up, though not yet cryptographically relevant.
- Trapped-ion progress across IonQ plus Quantinuum is the most promising near-term path to hundreds of logical qubits.
- If IonQ and Quantinuum combined reach thousands of logical qubits within 10 years, the CRQC timeline compresses.
- For your PQC migration today, this remains an observational input; continue deploying ML-KEM hybrid regardless.
Frequently Asked Questions
Is IonQ publicly traded?
Yes, since 2021 via SPAC merger with dMY Technology Group III. Listed on NYSE under ticker IONQ.
What is #AQ36?
IonQ's algorithmic qubit rating for Forte Enterprise (September 2023). It indicates the system can reliably execute 36 effective qubits of algorithmic work, accounting for error rates. Analogous to IBM's Quantum Volume.
Is IonQ's technology the same as Quantinuum's?
Both use trapped-ion qubits. The specific ion species, trap architectures, and gate protocols differ. Both achieve high two-qubit gate fidelities (>99.5 percent).
What is the KISTI partnership?
In July 2025, Korean KISTI named IonQ as hardware partner for the Korean National Quantum Computing Center of Excellence, with IonQ to deliver a 100-qubit trapped-ion system.
Sources
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