Journal
NATIONAL SCIENCE REVIEW
Volume 7, Issue 10, Pages 1557-1563Publisher
OXFORD UNIV PRESS
DOI: 10.1093/nsr/nwaa148
Keywords
quantum coherent manipulation; spin-orbit coupling; spin-electric coupling; rare-earth ions; qubits
Categories
Funding
- National Basic Research Program of China [2018YFA0306003, 2017YFA0204903]
- National Natural Science Foundation of China [21822301, 11805024, 11847301]
- Beijing Academy of Quantum Information Sciences [Y18G23]
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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 pi/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.
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