Low-crosstalk optical addressing system for atomic qubits based on multiple objectives and acousto-optic deflectors
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arXiv
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| Auteurs principaux: | , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866916785968644096 |
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| author | Chen, Yi-Long Li, Rui-Rui He, Ran Chen, Shu-Qian Qi, Wen-Hao Cui, Jin-Ming Huang, Yun-Feng Li, Chuan-Feng Guo, Guang-Can |
| author_facet | Chen, Yi-Long Li, Rui-Rui He, Ran Chen, Shu-Qian Qi, Wen-Hao Cui, Jin-Ming Huang, Yun-Feng Li, Chuan-Feng Guo, Guang-Can |
| contents | Large-scale programmable trapped ion hardware, featuring high gate fidelity and long coherence times, is promising for realizing a practical fault-tolerant quantum computer (FTQC). However, individual addressing (IA) methods, which are important for implementing programmable gates in near-term quantum devices, can lead to undesired errors between the target ions and neighboring ions. In this work, we present a low-crosstalk optical addressing system based on multiple optical objectives and acousto-optic deflectors (AODs) with a symmetrical configuration. Two counter-propagating Raman operation beams are both tightly focused, generating an overlapping spot with a waist radius of approximately $1~\upmu\mathrm{m}$, to address the target ion. As a result, IA crosstalk, characterized by Rabi rate crosstalk on the spectator ion, is measured to be $1.19(5)\times10^{-3}$, with the two ions separated by approximately 5.5~$\upmu\mathrm{m}$. This low-crosstalk optical addressing system holds promise for high-fidelity entangling operations, and the symmetrically-configured AODs in our method can be readily extended to two dimensions to address a two-dimensional ion crystal. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_01307 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Low-crosstalk optical addressing system for atomic qubits based on multiple objectives and acousto-optic deflectors Chen, Yi-Long Li, Rui-Rui He, Ran Chen, Shu-Qian Qi, Wen-Hao Cui, Jin-Ming Huang, Yun-Feng Li, Chuan-Feng Guo, Guang-Can Quantum Physics Large-scale programmable trapped ion hardware, featuring high gate fidelity and long coherence times, is promising for realizing a practical fault-tolerant quantum computer (FTQC). However, individual addressing (IA) methods, which are important for implementing programmable gates in near-term quantum devices, can lead to undesired errors between the target ions and neighboring ions. In this work, we present a low-crosstalk optical addressing system based on multiple optical objectives and acousto-optic deflectors (AODs) with a symmetrical configuration. Two counter-propagating Raman operation beams are both tightly focused, generating an overlapping spot with a waist radius of approximately $1~\upmu\mathrm{m}$, to address the target ion. As a result, IA crosstalk, characterized by Rabi rate crosstalk on the spectator ion, is measured to be $1.19(5)\times10^{-3}$, with the two ions separated by approximately 5.5~$\upmu\mathrm{m}$. This low-crosstalk optical addressing system holds promise for high-fidelity entangling operations, and the symmetrically-configured AODs in our method can be readily extended to two dimensions to address a two-dimensional ion crystal. |
| title | Low-crosstalk optical addressing system for atomic qubits based on multiple objectives and acousto-optic deflectors |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2306.01307 |