(2+1)维U(1)狄拉克量子自旋液体中的边界临界性
Boundary Criticality in (2+1)-dimensional U(1) Dirac Quantum Spin Liquid
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中文总结 AI 辅助
通过半空间重整化群分析,揭示(2+1)维U(1)狄拉克自旋液体中涌现规范场的不同边界条件导致不同边界普适类,并给出可观测的标度维度及晶格模型实现方案。
中文摘要 AI 辅助
涌现规范场可以在不改变体量子自旋液体的情况下控制边界临界行为。我们研究了(2+1)维U(1)狄拉克自旋液体的边界临界性,其低能物理由无质量量子电动力学描述。利用半空间中的微扰重整化群分析,我们证明了涌现规范场的诺伊曼和狄利克雷边界条件导致不同的边界普适类。我们确定了基本场和规范不变算符的边界标度维度,这些算符提供了可观测的特征信号。我们进一步提出一个具有可调边界相互作用的费米子-规范晶格模型,作为实现和探测这些边界普适类的微观设置。
英文摘要
An emergent gauge field can control boundary critical behavior without changing the bulk quantum spin liquid. We investigate the boundary criticality in $(2+1)$-dimensional $U(1)$ Dirac spin liquid, whose low-energy physics is described by massless quantum electrodynamics. Using a perturbative renormalization-group analysis in a half-space, we show that Neumann and Dirichlet boundary conditions for the emergent gauge field lead to distinct boundary universality classes. We determine the boundary scaling dimensions of the fundamental fields and gauge-invariant operators that provide observable signatures. We further propose a fermion-gauge lattice model with tunable boundary interactions as a microscopic setting for realizing and probing these boundary universality classes.
发表机构
- Tulane University(杜兰大学)
- Xiamen University(厦门大学)
- Eastern Institute of Technology(宁波东方理工大学)
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