Tweezer-programmable 2D quantum walks in a Hubbard-regime lattice
Tweezer-programmable 2D quantum walks in a Hubbard-regime lattice
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DOI：
10.1126/science.abo0608
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发表时间：
2022-02
期刊：
影响因子：
56.9
通讯作者：
A. Young;William J. Eckner;N. Schine;Andrew M. Childs;A. Kaufman
中科院分区：
文献类型：
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作者：
A. Young;William J. Eckner;N. Schine;Andrew M. Childs;A. Kaufman
量子漫步为设计量子算法提供了一个既直观又通用的框架。为了利用这些行走的计算能力，重要的是能够可编程地修改步行者遍历的图，同时保持一致性。我们通过将光镊提供的快速、可编程控制与光晶格的可扩展、均匀环境相结合来实现这一点。有了这些工具，我们研究了连续时间量子行走的单原子在一个正方形晶格，并进行证明的原则演示空间搜索与这些行走。当扩展到更多粒子时，所展示的能力可以扩展到研究量子信息科学中的各种问题，包括使用具有更大连通性的更大图形执行更有效的空间搜索版本。在过去的二十年里，光学晶格一直被用作量子模拟的平台。最近，具有快速可重构性优点的光镊阵列已经崭露头角。Young等人将这些工具结合起来，对在光镊中制备的锶-88原子进行大规模量子行走，然后将其植入光晶格的位置。组合平台有望在量子科学中应用。使用锶-88原子在组合的光学镊子-晶格平台中的量子行走进行空间搜索。
Quantum walks provide a framework for designing quantum algorithms that is both intuitive and universal. To leverage the computational power of these walks, it is important to be able to programmably modify the graph a walker traverses while maintaining coherence. We do this by combining the fast, programmable control provided by optical tweezers with the scalable, homogeneous environment of an optical lattice. With these tools we study continuous-time quantum walks of single atoms on a square lattice and perform proof-of-principle demonstrations of spatial search with these walks. When scaled to more particles, the capabilities demonstrated can be extended to study a variety of problems in quantum information science, including performing more effective versions of spatial search using a larger graph with increased connectivity. Description Combining lattices and tweezers Optical lattices have been used as a platform for quantum simulation for the past two decades. More recently, arrays of optical tweezers, which have the advantage of rapid reconfigurability, have risen to prominence. Young et al. combined these tools to perform large-scale quantum walks of strontium-88 atoms prepared in optical tweezers and then implanted into the sites of an optical lattice. The combined platform holds promise for applications in quantum science. —JS A spatial search was performed using quantum walks of strontium-88 atoms in a combined optical tweezer-lattice platform.