Origin Wukong Tests Show Up to 98% Single-Router Transmission for QRAM
Key Takeaways
Router Result: A single quantum router on Origin Wukong reached up to about 98 percent information transmission efficiency.
Network Result: A two-layer routing network reached 93 percent transmission efficiency and, as a separate metric, 82.4 percent random-access fidelity.
Research Record: Origin Quantum, USTC, and Hefei partners published coherent quantum routers for bucket-brigade QRAM in Physical Review X on August 25, 2026.
Origin Quantum Computing Technology (Hefei) Co., Ltd. (Origin Quantum), the University of Science and Technology of China, and the Institute of Artificial Intelligence, Hefei Comprehensive National Science Center published the result in Physical Review X on August 25, 2026. The Anhui Provincial Key Laboratory of Quantum Computing Chips briefed Science and Technology Daily on September 2, 2026. The teams tested coherent quantum routers for bucket-brigade quantum random access memory on the third-generation Origin Wukong chip. A single router reached up to about 98 percent information transmission efficiency, a residual-population estimate rather than a certified system fidelity.
Coherent Routing on Superconducting Hardware
Researchers at the University of Science and Technology of China and Origin Quantum assembled the routers on the third-generation Origin Wukong chip, a 72-transmon superconducting processor with 126 couplers. Ten transmons sat in three connected triangles, each triangle one router. The Physical Review X paper describes a transition composite gate (TCG) scheme. Auxiliary energy levels let the TCG scheme replace a deep CSWAP decomposition with shallower two-qubit transition gates. Address bits sit in nonadjacent qutrit states |0⟩ and |2⟩ to enable erasure-detection post-selection.
Table: Transmission efficiency and random-access fidelity are different metrics.
Configuration | Transmission efficiency | Random-access fidelity |
Single router | Up to ~98% | 94.8% Average across three routers (peak 95.74%) |
Two-layer network | 93% | 82.4% |
- Experiment scope: three coherent quantum routers plus a two-layer routing network, not a full QRAM
- Device slice: 10 of 72 transmon qubits on third-generation Wukong
- Method: TCG scheme plus |0⟩/|2⟩ address encoding
- Single-router ~98% figure: leftover input population stayed below 2.05%
- Intended effect: shorter circuits as routing trees grow
Partners Pursue Scalable Quantum Memory
Science and Technology Daily said Origin Quantum jointly ran the work with USTC and the Institute of Artificial Intelligence, Hefei Comprehensive National Science Center. Quantum random access memory remains a building block for Grover’s search and quantum machine learning, so shallower routing is meant to limit circuit depth as memory trees grow.
- Partners: Origin Quantum; USTC; Institute of Artificial Intelligence, Hefei Comprehensive National Science Center
- Lab briefing: Anhui Provincial Key Laboratory of Quantum Computing Chips, September 2, 2026
- Company note: Origin also issued a press note cited by Global Times on September 3, 2026
- Paper: Physical Review X 16, 031051, published August 25, 2026
- Named uses in the paper: Grover’s search and quantum machine learning
Tian Feng, former dean of SenseTime’s Intelligence Industry Research Institute, told the Global Times a 98 percent routing efficiency “does not mean large-scale QRAM is ready for commercialization.” He listed error control, hardware stability, and system costs as the limits as networks grow.
Bottom Line
Origin Quantum, USTC, and Hefei partners measured coherent bucket-brigade QRAM routing on 10 Wukong qubits, with single-router transmission up to about 98 percent and a two-layer network at 93 percent transmission / 82.4 percent random-access fidelity.
Find out more here.
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Further articles, reports, and the latest quantum computing news may be found at The Qubit Report.
- Anhui Provincial Key Laboratory of Quantum Computing Chips, China, Hefei, Hefei Comprehensive National Science Center, Institute of Artificial Intelligence, Origin Quantum, Origin Wukong, Physical Review X (PRX), Quantum Network, quantum random access memory (QRAM), quantum router, University of Science and Technology of China (USTC)
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