非交换张量规范理论和量子动力学Yang-Baxter映射的非微扰方案
A Nonperturbative Proposal for Nonabelian Tensor Gauge Theory and Dynamical Quantum Yang-Baxter Maps
摘要：
本文提出了一种非交换两形式规范理论的非微扰方法。我们用格元作为基本动力学变量来描述格上的理论，并在每个边界链上分配U（N）Chan-Paton颜色。我们证明了，在超立方格上，这样的有色元格变量构成杨-巴克斯特映射，其中完整性的特点是量子杨-巴克斯特方程的某些动力学变形。对Wilson的格点规范理论的一致降维，找出了唯一的紧性条件.本文研究了一类理论，其中紧性条件是用拉克斯对求解的。我们发现，在朴素经典连续极限下，这些理论恢复了洛伦兹不变性，但在大N时，自由度的尺度为N^2。这意味着必须寻找非平凡的量子连续极限。我们证明，在降维后，这些理论减少到威尔逊的格点规范理论。我们还表明，威尔逊表面是定义良好的物理观测，没有订购的模糊性。利用格点强耦合展开，计算了Wilson曲面的配分函数和关联函数。我们发现，在大的$N$极限下，特征展开系数表现出比指数增长更快的高阶行为，与Wilson的格点规范理论形成鲜明对比。这暗示了一个隐藏的、弱耦合的理论，它与所提出的张量规范理论是对偶的。最后，我们讨论了我们的研究的相关性，强关联系统的拓扑量子秩序。
英文摘要：
We propose a nonperturbative approach to nonabelian two-form gauge theory. We formulate the theory on a lattice in terms of plaquette as fundamental dynamical variable, and assign U(N) Chan-Paton colors at each boundary link. We show that, on hypercubic lattices, such colored plaquette variables constitute Yang-Baxter maps, where holonomy is characterized by certain dynamical deformation of quantum Yang-Baxter equations. Consistent dimensional reduction to Wilson's lattice gauge theory singles out unique compactness condition. We study a class of theories where the compactness condition is solved by Lax pair ansatz. We find that, in naive classical continuum limit, these theories recover Lorentz invariance but have degrees of freedom that scales as N^2 at large N. This implies that nontrivial quantum continuum limit must be sought for. We demonstrate that, after dimensional reduction, these theories are reduced to Wilson's lattice gauge theory. We also show that Wilson surfaces are well-defined physical observables without ordering ambiguity. Utilizing lattice strong coupling expansion, we compute partition function and correlation functions of the Wilson surfaces. We discover that, at large $N$ limit, the character expansion coefficients exhibit large-order behavior growing faster than exponential, in striking contrast to Wilson's lattice gauge theory. This hints a hidden, weakly coupled theory dual to the proposed tensor gauge theory. We finally discuss relevance of our study to topological quantum order in strongly correlated systems.
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