Global competition has become intense and severe in the fields of quantum, semiconductor, and AI technologies. Silicon-based quantum computing, which combines cutting-edge quantum computing technology and semiconductor integrated circuit technology, has been rapidly developed in the past ten years and has shown great promise in realizing practical quantum computers.
Currently, modular and integrated quantum computation is the main focus in quantum computing research. To achieve this, one promising approach is to build many small-scale quantum computing modules, construct communication channels in between, and integrate them with classical IC circuits for quantum control. This is exactly the direction Xiao Xue has been focusing on in recent years.
In the research of computation module, Xiao achieved a two-qubit gate with a high fidelity of 99.65% in 2022, which for the first time meets the requirement for quantum error correction in silicon. In the study of integration, he collaborated with Intel Corporation and verified a cryogenic CMOS control chip based on Intel's 22 nm process, and in 2021, he reported an achievement of using a cryogenic chip to control a quantum chip. In the research of inter-module communication, he realized the first long-distance two-qubit logic in silicon using microwave photons in a superconductor resonator in 2023.
Based on these technologies, Xiao plans to build the first fully integrated modular silicon quantum processor to facilitate the industrialization of quantum computing and its applications in cryptography, communication, autonomous driving, drug discovery, and many other fields.
