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Perturbative study of the Kitaev model with spontaneous time-reversal symmetry breaking

机译:自发时间反转对称性破坏的Kitaev模型的摄动研究

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We analyze the Kitaev model on the triangle-honeycomb lattice whose ground state has recently been shown to be a chiral spin liquid. We consider two rperturbative expansions: the isolated-dimer limit containing Abelian anyons and the isolated-triangle limit. In the former case, we derive the low-energy effective theory and discuss the role played by multiplaquette interactions. In this phase, we also compute the spin-spin correlation functions for any vortex configuration. In the isolated-triangle limit, we show that the effective theory is, at lowest nontrivial order, the Kitaev honeycomb model at the isotropic point. We also compute the next-order correction which opens a gap and yields non-Abelian anyons.
机译:我们分析了三角形蜂窝格上的Kitaev模型,该网格最近已被证明是一种手性自旋液体。我们考虑两个扰动展开式:包含Abelian anyon的孤立二聚极限和孤立三角形极限。在前一种情况下,我们推导出了低能量有效理论,并讨论了多壁板相互作用的作用。在这一阶段,我们还计算任何旋涡配置的自旋-自旋相关函数。在孤立的三角形极限中,我们证明了有效的理论是在各向同性点处的最低非平凡阶的Kitaev蜂窝模型。我们还计算了下一个校正值,该校正值产生了一个间隙并产生了非阿贝尔的任意子。

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