Experimental Realization of Multi-ion Sympathetic Cooling on a Trapped Ion Crystal

Z.-C. Mao, Y.-Z. Xu, Q.-X. Mei, W.-D. Zhao, Y. Jiang, Y. Wang, X.-Y. Chang, L. He, L. Yao, Z.-C. Zhou, Y.-K. Wu, and L.-M. Duan
Phys. Rev. Lett. 127, 143201 – Published 27 September 2021
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Abstract

Trapped ions are one of the leading platforms in quantum information science. For quantum computing with large circuit depth and quantum simulation with long evolution time, it is of crucial importance to cool large ion crystals at runtime without affecting the internal states of the computational qubits, thus the necessity of sympathetic cooling. Here, we report multi-ion sympathetic cooling on a long ion chain using a narrow cooling beam focused on two adjacent ions, and optimize the choice of the cooling ions according to the collective oscillation modes of the chain. We show that, by cooling a small fraction of ions, cooling effects close to the global Doppler cooling limit can be achieved. This experiment therefore demonstrates an important enabling step for quantum information processing with large ion crystals.

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  • Received 27 May 2021
  • Accepted 30 August 2021

DOI:https://doi.org/10.1103/PhysRevLett.127.143201

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Z.-C. Mao1,*, Y.-Z. Xu1,*, Q.-X. Mei1, W.-D. Zhao1, Y. Jiang1, Y. Wang2,†, X.-Y. Chang1, L. He1, L. Yao1, Z.-C. Zhou1,3,‡, Y.-K. Wu1,§, and L.-M. Duan1,∥

  • 1Center for Quantum Information, Institute for Interdisciplinary Information Sciences, Tsinghua University, Beijing 100084, People’s Republic of China
  • 2School of Physics, Peking University, Beijing 100871, People’s Republic of China
  • 3Beijing Academy of Quantum Information Sciences, Beijing 100193, People’s Republic of China

  • *These authors contributed equally to this work.
  • Present address: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
  • zichaozhou@mail.tsinghua.edu.cn
  • §wyukai@mail.tsinghua.edu.cn
  • lmduan@tsinghua.edu.cn

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Issue

Vol. 127, Iss. 14 — 1 October 2021

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