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arXiv 2302.05060cond-mat.str-elcond-mat.quant-gasquant-ph
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$\mathbb{Z}_3$ Kitaev模型中的手性自旋液体

Chiral spin liquid in a $\mathbb{Z}_3$ Kitaev model

Li-Mei Chen, Tyler D. Ellison, Meng Cheng, Peng Ye, Ji-Yao Chen

AI总结:

研究蜂窝晶格上$\mathbb{Z}_3$ Kitaev模型,发现铁磁各向同性耦合下实现具有$\mathrm{U}(1)_{12}$手性拓扑序的手性自旋液体,并通过矩阵乘积态模拟验证了其能隙体相和手性边缘理论。

摘要:

我们研究了蜂窝晶格上具有最近邻相互作用的$\mathbb{Z}_3$ Kitaev模型。基于矩阵乘积态模拟和对称性考虑,我们发现证据表明,在铁磁各向同性耦合下,该模型实现了一种手性自旋液体,其特征在于可能的$\mathrm{U}(1)_{12}$手性拓扑序。这得到了圆柱和条带几何结构上模拟的支持。在具有不同宽度的无限长圆柱上,纠缠熵和最大关联长度的标度分析表明该模型具有能隙的2D体相。提取的拓扑纠缠熵被发现与$\mathrm{U}(1)_{12}$拓扑序一致。在具有适中宽度的无限长条带上,我们发现模型处于临界状态,其中心电荷与$\mathrm{U}(1)_{12}$拓扑相的手性边缘理论一致。最后,我们讨论了几个开放问题。

英文摘要:

We study a $\mathbb{Z}_3$ Kitaev model on the honeycomb lattice with nearest neighbor interactions. Based on matrix product state simulations and symmetry considerations, we find evidence that, with ferromagnetic isotropic couplings, the model realizes a chiral spin liquid, characterized by a possible $\mathrm{U}(1)_{12}$ chiral topological order. This is supported by simulations on both cylinder and strip geometries. On infinitely long cylinders with various widths, scaling analysis of entanglement entropy and maximal correlation length suggests that the model has a gapped 2D bulk. The topological entanglement entropy is extracted and found to be in agreement with the $\mathrm{U}(1)_{12}$ topological order. On infinitely long strips with moderate widths, we find the model is critical with a central charge consistent with the chiral edge theory of the $\mathrm{U}(1)_{12}$ topological phase. We conclude by discussing several open questions.

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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