An atomic-scale multi-qubit platform

• 成果类型: Article
• 署名作者: Wang, Yu; Chen, Yi; Bui, Hong T.; Wolf, Christoph; Haze, Masahiro; Mier, Cristina; Kim, Jinkyung; Choi, Deung-Jang; Lutz, Christopher P.; Bae, Yujeong; Phark, Soo-Hyon; Heinrich, Andreas J.
• 署名单位: Institute for Basic Science - Korea (IBS); Ewha Womans University; Peking University; Peking University; Tsinghua University; Collaborative Innovation Center of Quantum Matter; Ewha Womans University; University of Tokyo; University of Basque Country; Consejo Superior de Investigaciones Cientificas (CSIC); Basque Foundation for Science; International Business Machines (IBM); IBM USA
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-13891
• DOI: 10.1126/science.ade5050
• 发表日期: 2023-10-06
• 页码: 87-92
• 关键词: electron-paramagnetic-resonance; quantum information; individual atoms; spin-resonance; realization

摘要

Individual electron spins in solids are promising candidates for quantum science and technology, where bottom-up assembly of a quantum device with atomically precise couplings has long been envisioned. Here, we realized atom-by-atom construction, coherent operations, and readout of coupled electron-spin qubits using a scanning tunneling microscope. To enable the coherent control of remote qubits that are outside of the tunnel junction, we complemented each electron spin with a local magnetic field gradient from a nearby single-atom magnet. Readout was achieved by using a sensor qubit in the tunnel junction and implementing pulsed double electron spin resonance. Fast single-, two-, and three-qubit operations were thereby demonstrated in an all-electrical fashion. Our angstrom-scale qubit platform may enable quantum functionalities using electron spin arrays built atom by atom on a surface.