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Abstract

Ion trap is one of the leading physical platforms to implement quantum computation. Currently, high-fidelity elementary quantum operations above the fault-tolerant threshold, including state preparation, measurement and universal gates, have been demonstrated for tens of ionic qubits. One important future research direction is to further enlarge the qubit number to the scale required for solving practical problems while maintaining the high performance of individual qubits. This paper introduces the current mainstream schemes for scalable ion trap quantum computation like quantum charge-coupled device (QCCD) and ion-photon quantum network, and describes the main limiting factors in current research. Then we further explore new schemes to scale up the qubit number like two-dimensional ion crystals and dual-type qubit, and discuss the future research directions.

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Authors and contacts

Corresponding author:Duan Lu-Ming,lmduan@tsinghua.edu.cn

Funds:Project supported by the Innovation Program for Quantum Science and Technology, China (Grant No. 2021ZD0301601), the New Cornerstone Science Foundation through the New Cornerstone Investigator Program, the Ministry of Education of China, the Tsinghua University Initiative Scientific Research Program, China, the Tsinghua University Dushi Program, China, and the Tsinghua University Start-up Fund, China.

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Vol. 72, Issue 23 - 2023-12-05

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