Quantum Walk in Position Space with Single Optically Trapped Atoms
Quantum Walk in Position Space with Single Optically Trapped Atoms
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DOI：
10.1126/science.1174436
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发表时间：
2009-07-10
期刊：
影响因子：
56.9
通讯作者：
Widera, Artur
中科院分区：
文献类型：
--
作者：
Karski, Michal;Foerster, Leonid;Widera, Artur
量子漫步是著名的随机漫步的量子模拟，它构成了许多科学领域的模型和应用的基础。它的性质明显不同于经典的对应物，并可能导致在量子信息科学中的广泛应用。在我们的实验中，我们实现了一个量子行走线上的单个中性原子确定性离域的网站上的一维自旋相关的光学晶格。利用位置分辨荧光成像，最终的波函数的特点是局域量子态层析成像，其空间相干性证明。我们的系统允许观察量子到经典的转变，并为量子细胞自动机等应用铺平了道路。
The quantum walk is the quantum analog of the well-known random walk, which forms the basis for models and applications in many realms of science. Its properties are markedly different from the classical counterpart and might lead to extensive applications in quantum information science. In our experiment, we implemented a quantum walk on the line with single neutral atoms by deterministically delocalizing them over the sites of a one-dimensional spin-dependent optical lattice. With the use of site-resolved fluorescence imaging, the final wave function is characterized by local quantum state tomography, and its spatial coherence is demonstrated. Our system allows the observation of the quantum-to-classical transition and paves the way for applications, such as quantum cellular automata.