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arXiv 2305.03072cond-mat.str-elcond-mat.othermath-phmath.MP
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$G_2$ 可积点通过各向同性自旋-3 链的表征

$G_2$ Integrable Point Characterization via Isotropic Spin-3 Chains

Chengshu Li, Victor L. Quito, Dirk Schuricht, Pedro L. S. Lopes

AI总结:

本研究通过精确对角化和非阿贝尔DMRG数值分析$G_2$对称可积链,发现其低能行为由$(G_2)_1$ WZW理论描述,但共形数据表征存在挑战,该模型或有助于斐波那契任意子模型的开发。

摘要:

我们研究了具有基本表示下局域自由度的 $G_2$ 对称可积链的物理性质;鉴于可积性与临界点之间的典型联系,我们检验了该模型是否符合共形不变长距离行为的假设。利用 $G_2$ 例外李代数与具有局域自旋-3 表示的 $SU(2)$ 对称链之间的嵌入,我们通过针对特定自旋扇区的精确对角化(ED)以及非阿贝尔密度矩阵重正化群(DMRG)进行了数值分析。对动量分辨的 ED 谱的基本研究表明,低能系统有效地由 $(G_2)_1$ Wess-Zumino-Witten(WZW)理论描述,但我们在进一步数值表征共形数据方面遇到了挑战。对该模型现象学的研究和控制可能对开发斐波那契任意子的可访问模型具有意义。

英文摘要:

We investigate the physical properties of $G_2$-symmetric integrable chains with local degrees of freedom in the fundamental representation; given the typical connection between integrability and critical points, we test the model's properties against a hypothesis of conformal-invariant long-distance behavior. Leveraging an embedding between the $G_2$ exceptional Lie algebra and $SU(2)$-symmetric chains with local spin-3 representations, we perform numerical analyses via exact diagonalization (ED) targeted at specific spin sectors, as well as via non-Abelian density-matrix renormalization group (DMRG). A basic study of the momentum-resolved ED spectrum suggests the low-energy system is effectively described by a $(G_2)_1$ Wess--Zumino--Witten (WZW) theory, but we find challenges in further numerical characterization of conformal data. The study and control of the phenomenology of this model may have implications for the development of accessible models for Fibonacci anyons.

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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