Electric field manipulation enhanced by strong spin-orbit coupling: promoting rare-earth ions as qubits

• 作者: Shang-Da Jiang Si-Xue Qin Song Gao Ye-Xin Wang Yu-Hui Fang Zhe-Ming Wang Zheng Liu
• 来源期刊: 国家科学评论（英文版）
• 年，卷（期）: 2020,（10）
• 所属期刊栏目: RESEARCH ARTICLES
• 页码范围: 1557-1563
• 页数: 7页
• 语种: 英文
• DOI: 10.1093/nsr/nwaa148

摘要

Quantum information processing based on magnetic ions has potential for applications as the ions can be modified in their electronic properties and assembled by a variety of chemical methods.For these systems to achieve individual spin addressability and high energy efficiency,we exploited the electric field as a tool to manipulate the quantum behaviours of the rare-earth ion which has strong spin-orbit coupling.A Ce:YAG single crystal was employed with considerations to the dynamics and the symmetry requirements.The Stark effect of the Ce3+ ion was observed and measured.When demonstrated as a quantum phase gate,the electric field manipulation exhibited high efficiency which allowed up to 57 π/2 operations before decoherence with optimized field direction.It was also utilized to carry out quantum bang-bang control,as a method of dynamic decoupling,and the refined Deutsch-Jozsa algorithm.Our experiments highlighted rare-earth ions as potentially applicable qubits because they offer enhanced spin-electric coupling which enables high-efficiency quantum manipulation.