光晶格中的强关联量子行走
Strongly Correlated Quantum Walks in Optical Lattices
摘要：
完全控制相互作用的、不可分辨的量子粒子的动力学是强关联量子物质实验研究和实现高保真量子信息处理的重要前提。在这里，我们证明了这种控制的量子行走-量子力学模拟的经典随机行走-在强相互作用制度。利用光晶格中的相互作用玻色子原子，我们直接观察到的基本效应，如出现在两个粒子的量子行走的相关性，以及在倾斜的光晶格的强相关布洛赫振荡。我们的方法可以扩展到更大的系统，大大扩展了通过量子行走可访问的问题类别
英文摘要：
Full control over the dynamics of interacting, indistinguishable quantum particles is an important prerequisite for the experimental study of strongly correlated quantum matter and the implementation of high-fidelity quantum information processing. Here we demonstrate such control over the quantum walk - the quantum mechanical analogue of the classical random walk - in the strong interaction regime. Using interacting bosonic atoms in an optical lattice, we directly observe fundamental effects such as the emergence of correlations in two-particle quantum walks, as well as strongly correlated Bloch oscillations in tilted optical lattices. Our approach can be scaled to larger systems, greatly extending the class of problems accessible via quantum walks
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