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Holographic optical traps for atom-based topological Kondo devices

机译:用于基于原子的拓扑近藤设备的全息光阱

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摘要

The topological Kondo (TK) model has been proposed in solid-state quantum devices as a way to realize non-Fermi liquid behaviors in a controllable setting. Another motivation behind the TK model proposal is the demand to demonstrate the quantum dynamical properties of Majorana fermions, which are at the heart of their potential use in topological quantum computation. Here we consider a junction of crossed Tonks-Girardeau gases arranged in a star-geometry (forming a Y-junction), and we perform a theoretical analysis of this system showing that it provides a physical realization of the TK model in the realm of cold atom systems. Using computer-generated holography, we experimentally implement a Y-junction suitable for atom trapping, with controllable and independent parameters. The junction and the transverse size of the atom waveguides are of the order of 5 mu m, leading to favorable estimates for the Kondo temperature and for the coupling across the junction. Since our results show that all the required theoretical and experimental ingredients are available, this provides the demonstration of an ultracold atom device that may in principle exhibit the TK effect.
机译:拓扑近藤(TK)模型已在固态量子器件中提出,作为一种在可控环境中实现非费米液体行为的方法。 TK模型建议背后的另一个动机是需要证明马里亚纳费米子的量子动力学特性,这是它们在拓扑量子计算中潜在应用的核心。在这里,我们考虑以星形几何形状排列的交叉Tonks-Girardeau气体的交汇点(形成Y形结点),我们对该系统进行了理论分析,表明该系统在寒冷的环境中提供了TK模型的物理实现。原子系统。使用计算机生成的全息技术,我们实验性地实现了适用于原子捕获的Y形结,具有可控且独立的参数。原子波导的结点和横向尺寸约为5微米,从而可以得到对近藤温度和结点耦合的有利估计。由于我们的结果表明所有所需的理论和实验成分均可用,因此这证明了原则上可能表现出TK效应的超冷原子装置。

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