Many-body interferometry with semiconductor spins

• 成果类型: Article
• 署名作者: Jirovec, D.; Reale, S.; Cova Farina, P.; Ventura-Meinersen, C.; Nguyen, M. P.; Zhang, X.; Oosterhout, S. D.; Scapucci, G.; Veldhorst, M.; Rimbach-Russ, M.; Bosco, S.; Vandersypen, L. M. K.
• 署名单位: Delft University of Technology; Netherlands Organization Applied Science Research
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8075; 1095-9203
• DOI: 10.1126/science.aed4177
• 发表日期: 2026-04-09
• 页码: 183-187
• 关键词: QUANTUM SIMULATIONS; thermalization; localization

摘要

Quantum simulators enable studies of many-body phenomena, which are intractable with classical hardware. The manipulation of electronic spin states in devices based on semiconductor quantum dots promises precise electrical control and scalability advantages, but accessing many-body phenomena has so far been restricted by challenges in nanofabrication and simultaneous control of multiple interactions. In this study, we performed spectroscopy of up to eight interacting spins using a 2-& times;-4 array of gate-defined germanium quantum dots. The spectroscopy protocol is based on Ramsey interferometry and adiabatic mapping of many-body eigenstates to single-spin eigenstates, enabling complete energy spectrum reconstruction. As the interaction strength exceeds magnetic disorder, we observed signatures of the crossover from localization to a chaotic phase marking a step toward the observation of many-body phenomena in quantum dot systems.