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arXiv 2306.08596quant-phcond-mat.quant-gasphysics.atom-ph
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Floquet定制的里德伯相互作用

Floquet-Tailored Rydberg Interactions

Luheng Zhao, Michael Dao Kang Lee, Mohammad Mujahid Aliyu, Huanqian Loh

AI总结:

本研究利用Floquet频率调制打破里德伯阻塞对原子间距的限制,实现超阻塞半径的纠缠与相干延长,还制备了近距离里德伯反阻塞态,为高性能中性原子量子处理器提供新途径。

摘要:

里德伯阻塞是实现原子阵列中原子纠缠的关键要素。然而,它要求原子间距远小于阻塞半径,这限制了局域量子门的作用范围。本研究利用Floquet频率调制打破了这一限制,借此我们演示了超出传统阻塞半径的里德伯阻塞纠缠,并展示了扩大的纠缠范围如何提升中性原子阵列中的量子比特连通性。此外,我们发现纠缠态的相干性在Floquet频率调制下可得到延长。最后,我们在阻塞半径内实现了两个钠里德伯原子的里德伯反阻塞态。这类近距离原子的里德伯反阻塞态能够稳健制备强相互作用、长寿命的里德伯态,但仅靠传统静态驱动无法实现其稳态布居。本工作实现了里德伯阻塞与反阻塞两种典型机制间的转换,为用单一方法实现连通性更强、相干性更好且可调的中性原子量子处理器铺平了道路。

英文摘要:

The Rydberg blockade is a key ingredient for entangling atoms in arrays. However, it requires atoms to be spaced well within the blockade radius, which limits the range of local quantum gates. Here we break this constraint using Floquet frequency modulation, with which we demonstrate Rydberg-blockade entanglement beyond the traditional blockade radius and show how the enlarged entanglement range improves qubit connectivity in a neutral atom array. Further, we find that the coherence of entangled states can be extended under Floquet frequency modulation. Finally, we realize Rydberg anti-blockade states for two sodium Rydberg atoms within the blockade radius. Such Rydberg anti-blockade states for atoms at close range enables the robust preparation of strongly-interacting, long-lived Rydberg states, yet their steady-state population cannot be achieved with only the conventional static drive. Our work transforms between the paradigmatic regimes of Rydberg blockade versus anti-blockade and paves the way for realizing more connected, coherent, and tunable neutral atom quantum processors with a single approach.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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