用于相互作用驱动的里德堡门的相干运动控制协议
Protocols of coherent motion control for an interaction-driven Rydberg gate
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中文总结 AI 辅助
研究如何在中性原子量子计算机中产生两比特纠缠，提出结合光镊和二维光学晶格及多脉冲序列的相干控制技术，可降低门误差、减少原子加热，对误差和热激发有鲁棒性，为新里德堡门开辟道路。
中文摘要 AI 辅助
在中性原子量子计算机中，在两个里德堡原子间产生纠缠是核心。当前两比特门在里德堡阻塞机制下运行，未充分利用范德瓦尔斯相互作用，以避免对镊子捕获原子位置噪声敏感，代价是里德堡态停留时间长。本文提出一组基于结合光镊和二维光学晶格获得的原子运动相干控制以及多个开/关脉冲序列的技术。该协议使位置噪声导致的两比特门误差贡献低于\(10^{-4}\)，使原子加热小于\(\Delta n = 0.01\)，对高达\(50\)纳米的势对准误差和高达\(\bar{n} = 3\)的热激发具有鲁棒性。此工具箱为新的两比特里德堡门开辟了道路，原子在里德堡态仅停留约\(10\)纳秒，将源于其有限寿命的日益占主导的误差源最小化。
英文摘要
Generating entanglement between two Rydberg atoms is at the core of neutral-atom quantum computers. Current two-qubit gates operate in the Rydberg-blockade regime, in which the full strength of the van der Waals interaction between the two Rydberg atoms is not directly exploited, to avoid sensitivity to the position noise of the tweezer-trapped atoms, at the cost of a longer time spent in the Rydberg state. Here, we propose a set of techniques based on coherent control of the atomic motion obtained by combining optical tweezers and a two-dimensional optical lattice, and a sequence of multiple on/off pulses. The protocols keep the two-qubit gate error contribution from position noise below $10^{-4}$, heat the atom by less than~$Δn = 0.01$, while being robust to alignment errors of the potential up to $50$~nm and thermal excitation up to $\bar{n} = 3$. This toolbox opens the path for new two-qubit Rydberg gates directly, or partially, driven by the interaction, in which the atoms spend only $\sim 10$~ns in the Rydberg state, minimizing the increasingly dominant error source originating from its finite lifetime.
