AI 中文总结
研究在光镊中单个中性原子量子化运动里实现薛定谔猫态，通过调制深度和位置展示奇偶性控制与可调非线性，建立自旋和种类无关的控制框架，且编码对陷阱频率波动有鲁棒性，为量子纠错码和量子增强传感提供途径。
AI 中文摘要
薛定谔猫态作为经典或宏观上不同状态的量子叠加，是量子计算、增强计量学和大尺度相干探测的强大资源。在振荡器相空间中编码此类状态需要非线性，通常源于诸如原子自旋或约瑟夫森结等辅助自由度。可重构光镊阵列中的中性原子通过单个原子在紧密聚焦陷阱中的运动提供固有非线性。此前这种自克尔机制未用于猫态生成，也未充分探索其作为运动状态控制资源的潜力。本文在光镊捕获的单个中性原子的量子化运动中实现了薛定谔猫态。通过调制深度和位置，展示了克尔 - 猫态和福克态的奇偶性控制以及可调非线性，建立了与自旋和种类无关的运动控制框架。还表明猫态编码对陷阱频率波动具有内在鲁棒性，否则会限制直接福克态跃迁的保真度。这些结果确立了基于克尔的中性原子运动控制作为光镊中猫态和玻色子态工程的新范式，为诸如网格态的量子纠错码以及非高斯态阵列的量子增强传感提供了途径。
英文摘要
Schrödinger cat states - quantum superpositions of classically or macroscopically distinct states - constitute a powerful resource for quantum computing, enhanced metrology, and probing coherence on large scales. Encoding such states in the phase space of an oscillator requires a nonlinearity, typically inherited from an auxiliary degree of freedom such as atomic spin or a Josephson junction. Neutral atoms trapped in reconfigurable optical tweezer arrays - a leading platform for quantum science and computing - provide an intrinsic nonlinearity via the motion of a single atom in a tightly focused trap. However, this self-Kerr mechanism has not previously been exploited for cat-state generation, and remains largely unexplored as a resource for motional-state control. Here we realize Schrödinger cat states in the quantized motion of a single neutral atom trapped in an optical tweezer. By modulating the depth and position, we demonstrate parity control of both Kerr-cat and Fock states alongside tunable nonlinearity, establishing a spin- and species-independent framework for controlling motion. We further show that the cat-state encoding is intrinsically robust against trap-frequency fluctuations that otherwise limit the fidelity of direct Fock-state transitions. These results establish Kerr-based control of neutral-atom motion as a new paradigm for cat-state and bosonic-state engineering in optical tweezers, providing a route toward quantum-error-correcting codes such as grid states, and toward quantum-enhanced sensing with arrays of non-Gaussian states.
