2019/08/31 by Zheng Liu, Ye-Xin Wang, Yu-Hui Fang +4
Computer Science · Materials Science · Physics and Astronomy · #Electric field #Field (mathematics) #Ion #Magnetism in coordination complexes #Quantum #Quantum Computing Algorithms and Architecture #Quantum chaos and dynamical systems #Quantum computer #Quantum decoherence #Qubit #Spin (aerodynamics) #Trapped ion quantum computer #cond-mat.mtrl-sci #quant-ph
paper · pdf · doi:10.1093/nsr/nwaa148
published as National Science Review, 2020, https://doi.org/10.1093/nsr/nwaa148
openalex publication_date 2020/06/26 · openalex created_date 2020/07/02 · arxiv created 2020/07/17 · arxiv updated 2020/07/20 · openalex updated_date 2026/08/05
Abstract 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.