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arXiv 2104.05147cond-mat.str-elcond-mat.stat-mechhep-th
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非受限量子相变中自对偶保护的多临界性

Self-duality protected multi-criticality in deconfined quantum phase transitions

Da-Chuan Lu, Cenke Xu, Yi-Zhuang You

摘要:

对偶性对重整化群流和相图有重要的约束。对于自对偶理论,自对偶可以作为一种对称性来提升,这就导致了多重临界性。本文研究了作为自对偶理论的一个例子的去限制量子临界性的描述,$N_f=2$ QED $_3$,及其在微扰形变下的多临界行为。多重临界性是由Gross-Neveu耦合理论描述的,与标准的非限定量子临界性属于不同的普适性类。利用大- $N$重整化群分析方法,系统地计算了含Chern-Simons项和Gross-Neveu耦合的三维量子电动力学中各种算符的标度维数.具体地说,我们发现某些非相对论性的四费米子相互作用对应的二聚体-二聚体相互作用的晶格模型将驱动解除限制的量子临界的一阶跃迁,与以前的数值研究一致。

英文摘要:

Duality places an important constraint on the renormalization group flows and the phase diagrams. For self-dual theories, the self-duality can be promoted as a symmetry, this leads to the multi-criticalities. This work investigates a description of the deconfined quantum criticality, the $N_f=2$ QED$_3$, as an example of self-dual theories and its multi-critical behavior under perturbative deformations. The multi-criticality is described by the theory with Gross-Neveu couplings and falls in a different universality class than the standard deconfined quantum criticality. We systematically calculate the scaling dimensions of various operators in the 3d quantum electrodynamics with the Chern-Simons term and Gross-Neveu couplings by the large-$N$ renormalization group analysis. Specifically, we find certain non-relativistic four-fermion interactions corresponding to the dimer-dimer interactions in the lattice model will drive the deconfined quantum criticality to the first-order transition, consistent with previous numerical studies.

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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