NUSの量子科学者が最先端の無欠陥原子配列に成功(NUS quantum scientists achieve state-of-the-art defect-free atom array)


2023-04-26 シンガポール国立大学(NUS)

この研究は、2023年3月15日にPhysical Review Appliedに掲載され、American Physical Society Physics誌でも特集されている。


マルチツイーザーアルゴリズムによる任意の欠陥のない原子配列の並列組立 Parallel Assembly of Arbitrary Defect-Free Atom Arrays with a Multitweezer Algorithm

Weikun Tian, Wen Jun Wee, An Qu, Billy Jun Ming Lim, Prithvi Raj Datla, Vanessa Pei Wen Koh, and Huanqian Loh
Physical Review Applied  Published 15 March 2023

NUSの量子科学者が最先端の無欠陥原子配列に成功(NUS quantum scientists achieve state-of-the-art defect-free atom array)


Defect-free atom arrays are a precursor for quantum information processing and quantum simulation with neutral atoms. Yet, large-scale defect-free atom arrays can be challenging to realize, due to the losses encountered when rearranging stochastically loaded atoms to achieve a desired target array. Here, we demonstrate a parallel rearrangement algorithm that uses multiple mobile tweezers to independently sort and compress atom arrays in a way that naturally avoids atom collisions. With a high degree of parallelism, our algorithm offers a reduced move complexity compared to both single-tweezer algorithms and existing multitweezer algorithms. We further determine the optimal degree of parallelism to be a balance between an algorithmic speedup and multitweezer inhomogeneity effects. The defect-free probability for a 225-atom array is demonstrated to be as high as 33(1)% in a room-temperature setup after multiple cycles of rearrangement. The algorithm presented here can be implemented for any target array geometry with an underlying periodic structure.