Dipolar spin-exchange and entanglement between molecules in an optical tweezer array

• 成果类型: Article
• 署名作者: Bao, Yicheng; Yu, Scarlett S.; Anderegg, Loic; Chae, Eunmi; Ketterle, Wolfgang; Ni, Kang-Kuen; Doyle, John M.
• 署名单位: Harvard University; Harvard University; Korea University; Massachusetts Institute of Technology (MIT); Harvard University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8579
• DOI: 10.1126/science.adf8999
• 发表日期: 2023-12-08
• 关键词: coherence; DYNAMICS; cold; gas

摘要

Ultracold polar molecules are promising candidate qubits for quantum computing and quantum simulations. Their long-lived molecular rotational states form robust qubits, and the long-range dipolar interaction between molecules provides quantum entanglement. In this work, we demonstrate dipolar spin-exchange interactions between single calcium monofluoride (CaF) molecules trapped in an optical tweezer array. We realized the spin- 12 quantum XY model by encoding an effective spin- 12 system into the rotational states of the molecules and used it to generate a Bell state through an iSWAP operation. Conditioned on the verified existence of molecules in both tweezers at the end of the measurement, we obtained a Bell state fidelity of 0.89(6). Using interleaved tweezer arrays, we demonstrate single-site molecular addressability.