China Quantum Computing: Jiuzhang, Zuchongzhi and the Quantum Race
China has emerged as one of the top two global competitors in quantum computing, alongside the United States. Led by researchers at the University of Science and Technology of China (USTC) under Pan Jianwei, China has demonstrated quantum computational advantage with two distinct approaches: photonic quantum computing (Jiuzhang series) and superconducting quantum computing (Zuchongzhi series). With billions in government investment and a national quantum lab network, China aims to build a practical quantum computer by 2030.
TL;DR
China has demonstrated quantum supremacy with both photonic (Jiuzhang) and superconducting (Zuchongzhi) quantum computers. The country invests billions annually and targets a fault-tolerant quantum computer by 2030.
Key Insights
Jiuzhang (Photonic)
Jiuzhang 3.0 (2024) uses 255 modes and detects up to 76 photons, achieving a 10^15 fold speedup over classical supercomputers for Gaussian boson sampling. This is a purely photonic approach, avoiding the extreme cooling requirements of superconducting qubits.
Zuchongzhi (Superconducting)
Zuchongzhi 2.1 uses 66 superconducting qubits to solve random circuit sampling problems 10 million times faster than classical supercomputers. It is fabricated using China's domestic flip-chip process technology.
Quantum Communication
China operates the world's longest quantum key distribution network via the Micius satellite (2,000+ km) and the Beijing-Shanghai ground fiber link (2,000+ km). This hybrid space-ground QKD network enables secure communications for government and financial institutions.
Government Investment
China's national quantum program has received over 15 billion USD in government funding. The megaproject launched in 2016 with a multi-billion dollar budget spans quantum computing, communication, and measurement. China filed more quantum patents than any other country in 2023.
Talent Pipeline
The University of Science and Technology of China (USTC) and Chinese Academy of Sciences (CAS) form the core of China's quantum talent pipeline. China now produces more quantum computing PhDs annually than the United States and EU combined.
Industry Players
Origin Quantum (Benyuan) has shipped China's first commercial superconducting quantum computers (Wukong series). China Ion Quantum Scientific (CISS) leads trapped-ion quantum computing. Both companies have achieved qubit counts comparable to early IBM and IonQ systems.
Side-by-Side Comparison
| Metric | China (USTC) | United States (IBM/Google) | EU (IQM/Atos) |
|---|---|---|---|
| Quantum Supremacy | Achieved (Jiuzhang, Zuchongzhi) | Achieved (Sycamore) | In progress |
| Max Qubits (Superconducting) | 66 (Zuchongzhi 2.1) | 1,121 (IBM Condor) | 20-50 |
| Max Photons (Photonic) | 76 (Jiuzhang 3.0) | ~50 (Xanadu) | N/A |
| Government Investment | $15B+ | $3.5B (National Quantum Initiative) | $1.5B+ (combined) |
| Quantum Patents (2023) | Most in world | 2nd most | 3rd most |
| Commercial Systems | Origin Wukong (24 qubits) | IBM Quantum (1000+ qubits) | IQM (20+ qubits) |
| Quantum Network | Satellite + ground QKD | Metropolitan QKD networks | EuroQCI network |
Frequently Asked Questions
Jiuzhang is a photonic quantum computer developed by USTC researchers led by Pan Jianwei. Unlike superconducting quantum computers that need near-absolute-zero temperatures, Jiuzhang uses light particles (photons) to perform calculations. Jiuzhang 3.0, released in 2024, uses 255 modes and can detect up to 76 photons simultaneously.
Yes. China has demonstrated quantum computational advantage through two systems: Jiuzhang (photonic, 2020/2021/2024) and Zuchongzhi (superconducting, 2021). Both achieved speedups over classical supercomputers for their respective benchmark problems, though these are specialized tasks rather than universal computation.
Pan Jianwei is a Chinese physicist often called the father of China's quantum program. He leads the quantum information research group at USTC and has been the driving force behind both Jiuzhang and Zuchongzhi. His team also built the Micius quantum satellite and the Beijing-Shanghai QKD network.
China and the US are roughly tied in quantum computing capability but take different approaches. The US leads in superconducting qubit count (IBM's 1,121 qubits vs China's 66). China leads in photonic quantum computing and quantum communication. China invests more government money ($15B+ vs $3.5B), while the US has stronger private sector investment from IBM, Google, and startups.
Origin Quantum (Benyuan), China's leading commercial quantum computing company, has shipped its Wukong series superconducting quantum computers to research institutions. However, these are available primarily for domestic Chinese users due to export control restrictions. International access is limited.