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arXiv 0811.1668cond-mat.str-elcond-mat.mes-hall
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小自旋晶格中非阿贝尔熔合规则的显式说明

Explicit illustration of non-abelian fusion rules in a small spin lattice

Yue Yu, Tieyan Si

摘要:

利用解析对角化方法精确求解了四面体中具有基塔耶夫耦合的四格点自旋模型。利用泡利矩阵在实空间中明确地说明了该小格子模型中本征涡激发的非交换融合规则。与大晶格上Kitaev模型的解相比,我们的解给出了一个直观的图像,用实空间自旋组态直接表达了Majorana费米子的零模、非阿贝尔涡旋和非阿贝尔融合规则.我们将单四面体模型推广到环面上的四面体链模型,发现非阿贝尔涡旋变成了定义明确的非阿贝尔任意子。我们相信这些明显的结果对于在实验室中证明非交换任意子是很有帮助的。

英文摘要:

We exactly solve a four-site spin model with site-dependent Kitaev's coupling in a tetrahedron by means of an analytical diagonalization. The non-abelian fusion rules of eigen vortex excitations in this small lattice model are explicitly illustrated in real space by using Pauli matrices. Comparing with solutions of Kitaev models on large lattices, our solution gives an intuitional picture using real space spin configurations to directly express zero modes of Majorana fermions, non-abelian vortices and non-abelian fusion rules. We generalize the single tetrahedron model to a chain model of tetrahedrons on a torus and find the non-abelian vortices become well-defined non-abelian anyons. We believe these manifest results are very helpful to demonstrate the nonabelian anyon in laboratory.

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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