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arXiv 1602.05709cond-mat.quant-gasphysics.atom-phquant-ph
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四体环交换相互作用的观测与任意分数统计

Observation of Four-body Ring-exchange Interactions and Anyonic Fractional Statistics

Han-Ning Dai, Bing Yang, Andreas Reingruber, Hui Sun, Xiao-Fan Xu, Yu-Ao Chen, Zhen-Sheng Yuan, Jian-Wei Pan

摘要:

环交换是一种用于模拟非常规拓扑物质的基本相互作用,有望实现高效的量子信息处理。本文报道了在超冷原子系统中观察到的四体环交换相互作用和任意子激发的拓扑性质。最小复曲面码汉密尔顿算子(其中环交换是主导项)是通过设计哈伯德汉密尔顿算子来实现的,哈伯德汉密尔顿算子描述了由两个正交超晶格形成的不连接元格阵列中的原子自旋。环交换相互作用的自旋顺序的动力学演化,以及与预测的自旋系统的两个任意子激发之间的能隙匹配。编织操作被施加到血小板中的自旋,并观察到四自旋状态下的诱导相$1.00(3)π$,证实了$\frac{1}{2}$ -anynoic统计。这项工作是研究多体系统拓扑问题以及量子计算和模拟应用的重要一步。

英文摘要:

Ring exchange is an elementary interaction for modeling unconventional topological matters which hold promise for efficient quantum information processing. We report the observation of four-body ring-exchange interactions and the topological properties of anyonic excitations within an ultracold atom system. A minimum toric code Hamiltonian in which the ring exchange is the dominant term, was implemented by engineering a Hubbard Hamiltonian that describes atomic spins in disconnected plaquette arrays formed by two orthogonal superlattices. The ring-exchange interactions were resolved from the dynamical evolutions in the spin orders, matching well with the predicted energy gaps between two anyonic excitations of the spin system. A braiding operation was applied to the spins in the plaquettes and an induced phase $1.00(3)π$ in the four-spin state was observed, confirming $\frac{1}{2}$-anynoic statistics. This work represents an essential step towards studying topological matters with many-body systems and the applications in quantum computation and simulation.

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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