论文标题

将分数量子厅Laughlin和Ja那教拓扑命令与Anyon Collider进行比较

Comparing fractional quantum Hall Laughlin and Jain topological orders with the anyon collider

论文作者

Ruelle, M., Frigerio, E., Berroir, J. -M., Plaçais, B., Rech, J., Cavanna, A., Gennser, U., Jin, Y., Fève, G.

论文摘要

Anyon Collision实验最近证明了鉴于费米子和任何人统计的能力。但是,到目前为止,已经探究了与简单的Laughlin状态相关的一种类型的与简单的Laughlin状态相关的人。现在,重要的是将任何人碰撞作为对更复杂拓扑顺序的分数统计探针的定量探针,并能够区分具有不同统计的人的不同物种。在这项工作中,我们使用Anyon Collider比较Laughlin $ν= 1/3 $状态,该状态被用作参考状态,更复杂的Ja那教状态为$ν= 2/5 $,其中低能激发由两个共同传播的边缘频道携带。我们证明,与$ν= 1/3 $相比,在$ν= 2/5 $状态的外部通道上生成的任何人(分数费用$ e^*= e/3 $)具有相似的行为,显示了同一类型的任何人的稳健性。相比之下,与$ν= 1/3 $案例相比,在$ν= 2/5 $的内通道上发出的任何人(带有分数费用$ e^*= e/5 $)表现出降低的束束性,这表明了任何人与不同的物种之间不仅在不同物种之间歧视的人,而且与不同的近户之间的差异相比,也有歧视的能力。我们对$ν= 2/5 $的内通道的实验结果也表明在存在几个共同传播的边缘通道时,在任何人碰撞实验中的频道相互作用的影响。对这些效果的定量理解对于将Anyon碰撞的扩展到非亚洲拓扑秩序的扩展很重要,在非 - 亚伯式拓扑秩序中,几种充电和中性模式在边缘传播。

Anyon collision experiments have recently demonstrated the ability to discriminate between fermionic and anyonic statistics. However, only one type of anyons associated with the simple Laughlin state at filling factor $ν=1/3$ has been probed so far. It is now important to establish anyon collisions as quantitative probes of fractional statistics for more complex topological orders, with the ability to distinguish between different species of anyons with different statistics. In this work, we use the anyon collider to compare the Laughlin $ν=1/3$ state, which is used as the reference state, with the more complex Jain state at $ν=2/5$, where low energy excitations are carried by two co-propagating edge channels. We demonstrate that anyons generated on the outer channel of the $ν=2/5$ state (with a fractional charge $e^*=e/3$) have a similar behavior compared to $ν=1/3$, showing the robustness of anyon collision signals for anyons of the same type. In contrast, anyons emitted on the inner channel of $ν=2/5$ (with a fractional charge $e^*=e/5$) exhibit a reduced degree of bunching compared to the $ν=1/3$ case, demonstrating the ability of the anyon collider to discriminate not only between anyons and fermions, but also between different species of anyons associated with different topological orders of the bulk. Our experimental results for the inner channel of $ν=2/5$ also point towards an influence of interchannel interactions in anyon collision experiments when several co-propagating edge channels are present. A quantitative understanding of these effects will be important for extensions of anyon collisions to non-abelian topological orders, where several charged and neutral modes propagate at the edge.

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