High-Fidelity Two-Qubit Gates Using a Microelectromechanical-System-Based Beam Steering System for Individual Qubit Addressing.

@article{Wang2020HighFidelityTG,
  title={High-Fidelity Two-Qubit Gates Using a Microelectromechanical-System-Based Beam Steering System for Individual Qubit Addressing.},
  author={Ye Wang and Stephen Crain and Chao Fang and Bichen Zhang and Shilin Huang and Qiyao Liang and Pak Hong Leung and Kenneth R. Brown and Jungsang Kim},
  journal={Physical review letters},
  year={2020},
  volume={125 15},
  pages={
          150505
        }
}
In a large scale trapped atomic ion quantum computer, high-fidelity two-qubit gates need to be extended over all qubits with individual control. We realize and characterize high-fidelity two-qubit gates in a system with up to four ions using radial modes. The ions are individually addressed by two tightly focused beams steered using microelectromechanical system mirrors. We deduce a gate fidelity of 99.49(7)% in a two-ion chain and 99.30(6)% in a four-ion chain by applying a sequence of up to… 

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