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arXiv 2103.08434cond-mat.str-el
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Gross-Neveu Heisenberg临界性:量子自旋Hall质量的动力学产生

Gross-Neveu Heisenberg criticality: dynamical generation of quantum spin Hall masses

Yuhai Liu, Zhenjiu Wang, Toshihiro Sato, Wenan Guo, Fakher F. Assaad

摘要:

我们认为费米子的蜂窝晶格补充自旋不变的相互作用,动态生成量子自旋霍尔绝缘体。该晶格模型提供了Gross-Neveu Heisenberg临界性的实例,例如通过蜂窝晶格上的哈伯德模型实现。使用辅助场量子蒙特卡罗模拟,我们表明,我们可以计算前所未有的精度的序参量的可计算性。在O(N)Gross-Neveu跃迁中,玻色模的反常维数随N的函数而增长,因此在大N极限下,考虑双折射率而不是等时相关性是特别重要的,以便最大限度地减少背景的贡献。对于N=3的情形,我们分别得到了关联长度指数、玻色子和费米子反常维数的$1/ν=1.11(4)$、$η_ϕ=0.80(9)$和$η_ψ=0.29(2)$.

英文摘要:

We consider fermions on a honeycomb lattice supplemented by a spin invariant interaction that dynamically generates a quantum spin Hall insulator. This lattice model provides an instance of Gross-Neveu Heisenberg criticality, as realized for example by the Hubbard model on the honeycomb lattice. Using auxiliary field quantum Monte Carlo simulations we show that we can compute with unprecedented precision susceptibilities of the order parameter. In O(N) Gross-Neveu transitions, the anomalous dimension of the bosonic mode grows as a function of N such that in the large-N limit it is of particular importance to consider susceptibilities rather than equal time correlations so as to minimize contributions from the background. For the N=3 case, we obtain $1/ν=1.11(4)$, $η_ϕ=0.80(9)$, and $η_ψ=0.29(2)$ for respectively the correlation length exponent, bosonic and fermionic anomalous dimensions.

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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