New Quantum Supercomputer

China has recently made significant strides in quantum computing, unveiling several advanced quantum processors that push the boundaries of computational speed and qubit coherence.

In March 2025, scientists from the University of Science and Technology of China (USTC) introduced the Zuchongzhi-3, a superconducting quantum processor featuring 105 qubits. This processor demonstrated remarkable performance, executing specific quantum tasks at speeds up to one quadrillion (10¹⁵) times faster than the world's most powerful classical supercomputers. This achievement not only underscores China's leadership in quantum technology but also establishes a new benchmark in quantum computational advantage.

The Zuchongzhi-3 quantum processor, developed by the University of Science and Technology of China (USTC), represents a significant advancement in superconducting quantum computing. Building upon the architecture of its predecessors, Zuchongzhi-3 integrates 105 transmon qubits arranged in a 15×7 rectangular lattice. This configuration enhances qubit interconnectivity and data transfer rates, which are crucial for scaling up quantum systemsEach qubit is connected via a dense network of 182 tunable couplers, facilitating flexible two-qubit interactions across the chip.

This design maximizes entanglement opportunities while mitigating signal cross-talk, leading to improved operational fidelities. Specifically, Zuchongzhi-3 achieves single-qubit gate, two-qubit gate, and readout fidelities of 99.90%, 99.62%, and 99.18%, respectively.

Overall, the Zuchongzhi-3's architecture and design innovations position it as a leading platform in the pursuit of practical quantum computing applications.Google's Sycamore and China's Zuchongzhi research teams have been competing with each other to build the world's best quantum computer.

"We have successfully executed a larger scale random circuit sampling than previously achieved by Google, further widening the gap in computational capabilities between classical and quantum computing," researchers wrote in the study.

As per the researchers, the leap achieved by them was made possible due to optimisation of the processor's fabrication and wiring configuration.

"Our work not only advances the frontiers of quantum computing but also lays the groundwork for a new era where quantum processors play an essential role in tackling sophisticated real-world challenges," they added.