Related papers: A low-crosstalk double-side addressing system using acousto-optic deflectors for atomic ion qubits

A low-crosstalk double-side addressing system using acousto-optic deflectors for atomic ion qubits

URL: http://arxiv.org/abs/2306.01307v1
Date: Fri, 2 Jun 2023 07:12:59 GMT
Title: A low-crosstalk double-side addressing system using acousto-optic deflectors for atomic ion qubits
Authors: Rui-Rui Li and Yi-Long Chen and Ran He and Shu-Qian Chen and Wen-Hao Qi and Jin-Ming Cui and Yun-Feng Huang and Chuan-Feng Li and Guang-Can Guo
Abstract summary: We demonstrate a low-crosstalk double-side addressing system based on a pair of acousto-optic deflectors (AODs) The AODs addressing method can flexibly and parallelly address arbitrary ions between which the distance is variable in a chain. We employ two 0.4NA objective lenses in both arms of the Raman laser and obtain a beam waist of 0.95$mumathrmm$, resulting in a Rabi rate crosstalk as low as $6.32times10-4$ when the neighboring ion separation is about 5.5$mu
Score: 43.30164109590217
License: http://creativecommons.org/licenses/by/4.0/
Abstract: The ability to individually and agilely manipulate qubits is crucial for the scalable trapped-ion quantum information processing. A plethora of challenging proposals have been demonstrated with the utilization of optical addressing systems, in which single ions is addressed exclusively by individual laser beam. However, crosstalk error in optical addressing systems limits the gate fidelity, becoming an obstacle to quantum computing, especially quantum error correction. In this work, we demonstrate a low-crosstalk double-side addressing system based on a pair of acousto-optic deflectors (AODs). The AODs addressing method can flexibly and parallelly address arbitrary ions between which the distance is variable in a chain. We employ two 0.4~NA objective lenses in both arms of the Raman laser and obtain a beam waist of 0.95~$\mu\mathrm{m}$, resulting in a Rabi rate crosstalk as low as $6.32\times10^{-4}$ when the neighboring ion separation is about 5.5~$\mu\mathrm{m}$. This agile and low-crosstalk double-side addressing system is promising for higher-fidelity gates and the practical application of the quantum error correction.

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