arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.04609quant-ph
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最优控制非绝热完整单量子位量子门\\在囚禁离子中的实验实现

Experimental Realization of Nonadiabatic Holonomic Single-Qubit Quantum Gates\\ with Optimal Control in a Trapped Ion

Ming-Zhong Ai, Sai Li, Zhibo Hou, Ran He, Zhong-Hua Qian, Zheng-Yuan Xue, Jin-Ming Cui, Yun-Feng Huang, Chuan-Feng Li, Guang-Can Guo

摘要:

利用几何相位诱导的量子门进行量子计算,由于其对操作噪声的鲁棒性,被认为是容错量子计算中一种很有前途的策略。然而,由于以前方案的参数限制,完整量子门的主要鲁棒性优势被涂抹。在这里,我们通过实验证明了一种解决方案,基于共振驱动的三能级系统,在捕获的Yb离子中实现了具有最佳控制的非绝热完整单量子位量子门,该方案还具有演化速度快、实现方便的优点。与相应的几何门和传统的动态门相比,我们的方案的优势是,它是更强大的控制幅度误差,这是证实了通过量子过程层析成像和随机基准测试方法测量门失真。此外,我们还概述了非平凡的两个量子比特完整门也可以实现在现有的实验技术。因此,我们的实验验证了这种鲁棒和快速完整量子计算策略的可行性。

英文摘要:

Quantum computation with quantum gates induced by geometric phases is regarded as a promising strategy in fault tolerant quantum computation, due to its robustness against operational noises. However, because of the parametric restriction of previous schemes, the main robust advantage of holonomic quantum gates is smeared. Here, we experimentally demonstrate a solution scheme, demonstrating nonadiabatic holonomic single qubit quantum gates with optimal control in a trapped Yb ion based on three level systems with resonant drives, which also hold the advantages of fast evolution and convenient implementation. Compared with corresponding previous geometric gates and conventional dynamic gates, the superiority of our scheme is that it is more robust against control amplitude errors, which is confirmed by the measured gate infidelity through both quantum process tomography and random benchmarking methods. In addition, we also outline that nontrivial two qubit holonomic gates can also be realized within current experimental technologies. Therefore, our experiment validates the feasibility for this robust and fast holonomic quantum computation strategy.

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