Enhanced Bulk-Edge Coulomb Coupling in Fractional Fabry-Perot Interferometers.
Enhanced Bulk-Edge Coulomb Coupling in Fractional Fabry-Perot Interferometers.
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DOI：
10.1103/physrevlett.115.126807
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发表时间：
2014-11
影响因子：
8.6
通讯作者：
C. von Keyserlingk;S. H. Simon-S. H.-Simon-2254727862;B. Rosenow
中科院分区：
文献类型：
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作者：
C. von Keyserlingk;S. H. Simon-S. H.-Simon-2254727862;B. Rosenow
最近的实验使用法布里-珀罗(FP)干涉法声称ν=5/2量子霍尔态表现出非阿贝尔拓扑有序。我们注意到，实验似乎与忽略体边缘库仑耦合和Majorana隧道的模型不一致，因此我们重新检查了FP器件的理论。即使是适度的库仑耦合也可能强烈地影响一些分数高原，但对其他高原的影响非常弱，允许我们在广泛的高原上对数据进行建模。虽然实验与ν=5/2态具有摩尔-里德拓扑顺序是一致的，但它们可能测量了库仑效应，而不是由于非阿贝尔编织而产生的“奇偶效应”。
Recent experiments use Fabry-Perot (FP) interferometry to claim that the ν=5/2 quantum Hall state exhibits non-Abelian topological order. We note that the experiments appear inconsistent with a model neglecting bulk-edge Coulomb coupling and Majorana tunneling, so we reexamine the theory of FP devices. Even a moderate Coulomb coupling may strongly affect some fractional plateaus, but very weakly affect others, allowing us to model the data over a wide range of plateaus. While experiments are consistent with the ν=5/2 state harboring Moore-Read topological order, they may have measured Coulomb effects rather than an "even-odd effect" due to non-Abelian braiding.