The U.S. maintains a slight lead over China in quantum technology, but the gap is narrowing, according to a recent report.
The United States currently maintains a slight edge over China in the field of Quantum Information Science, Engineering, and Technology (QISET), but this advantage is diminishing, as highlighted in a recent report by the Special Competitive Studies Project (SCSP).
The report evaluates both nations across five critical dimensions: innovation, industrial potential, market ecosystem, human resources, and government leverage. The U.S. excels in four of these areas, while China shows strength in government leverage due to its centralized approach and robust support.
“Overall, the U.S. maintains a slight advantage in QISET due to strengths in innovation, software, private capital, and specific elements of the supply chain. However, this gap is closing,” the report notes.
U.S. researchers contributed to 35% of the most cited quantum technology publications, outpacing China's 23%. While the U.S. is not losing ground, it faces rapid advancements from China, which has significantly increased its publication output over the last decade.
In quantum error correction, a crucial aspect of quantum computing, the U.S. leads with 55% of the most cited patents, compared to 18% from China. Additionally, American quantum software ecosystems, notably tools like IBM's Qiskit and Google's Cirq, dominate global usage, with Qiskit downloads surpassing 450,000, while China's PyQPanda has only seen about 4,000 downloads.
The U.S. quantum sector attracted about $5.3 billion in private investments by 2024, with projections of 39 to 73 operational quantum computers by 2025. Conversely, China is estimated to have 15 to 18 quantum systems in place, though this figure may be understated due to a lack of transparency.
China's Rapid Advancements
China is making significant strides, particularly in advanced quantum materials and algorithms. Chinese researchers produce approximately 50% of the top publications in quantum materials, while the U.S. accounts for roughly 20%. In terms of patents related to quantum algorithms, China has surpassed the U.S. with a ratio of 5:2, although American authors still dominate publication counts.
Notably, China is leading in quantum networks, successfully demonstrating quantum key distribution (QKD) over extensive distances, including a direct quantum communication network spanning 186 miles. In contrast, U.S. initiatives are limited to regional test sites, with the longest being 124 miles in the Chicago Quantum Network.
The U.S. has not prioritized QKD, as highlighted by the National Security Agency's acknowledgment of the complexities involved in implementing such technologies.
Challenges for the U.S. in Manufacturing and Workforce
The SCSP report identifies cost disparities in manufacturing, with U.S. clean room construction costs ranging from $800 to $1,000 per square foot, compared to about $150 in China, where local governments provide significant subsidies.
Despite these challenges, the U.S. retains advantages in niche supply chain areas, such as helium-3 and specialized cooling systems, although China is actively developing its own alternatives. Workforce dynamics also pose a challenge; while the U.S. has 61 institutions offering quantum programs and remains open to international researchers, China's production of STEM PhDs has significantly outpaced the U.S. since 2000, growing at three times the rate.
Funding Discrepancies and Strategic Approaches
By the end of 2024, China is expected to allocate approximately $15 billion for quantum technology funding, while U.S. investments over the past seven years total around $6 billion. The U.S. approach is decentralized, involving universities and startups, whereas China employs a centralized strategy with state laboratories and long-term plans.
Ultimately, the report concludes that the success of either nation in the quantum race will depend on their ability to solve engineering challenges and convert research into practical applications and standards.
