论文标题

使用保形引导程序搜索量学理论

Searching for gauge theories with the conformal bootstrap

论文作者

Li, Zhijin, Poland, David

论文摘要

仪表理论的红外固定点为现代形式的bootstrap计划提供了有趣的目标。在这项工作中,我们提供了一些初步的证据,表明一个测量的费米子CFT饱和引导范围,并有可能通过保形的引导程序解决。我们首先考虑$(n)$ vector 4点功能的bootstrap在一般尺寸$ d $中。在大$ n $限制中,最低$ so(n)$ singlet的缩放尺寸上的上限和无特里斯对称标量表通过$δ= d/2-1 $和$δ= d-1 $在两个溶液之间插值,并通过广义免费场理论。在3D中,众所周知,关键的$ o(n)$ vector模型可以使引导界饱和,并对应于接近$δ= 1/2 $的扭结范围。我们表明,引导程序边界还接纳了另一个无限的扭结家族$ {\ cal t} _d $,从下方,该$ n $ n $进近解决方案中包含$δ= d-1 $的免费fermion bilinears。扭结$ {\ cal t} _d $以$ d $依赖的关键$ n^*$在一般维度上出现,而扭结消失了。我们还研究了从bootstrap获得的界限与$(n)$ vectors,$ su(n)$基础知识与$ su(n)\ times su(n)$ bi-fundamentals之间的关系。我们提供了与不同全局对称性不同的引导程序边界之间的巧合。我们表明的证据表明,$ {\ cal t} _d $的基本理论的适当对称是$ so(n)$的子组,我们推测,扭结$ {\ cal t} _d $与固定的固定点相关。

Infrared fixed points of gauge theories provide intriguing targets for the modern conformal bootstrap program. In this work we provide some preliminary evidence that a family of gauged fermionic CFTs saturate bootstrap bounds and can potentially be solved with the conformal bootstrap. We start by considering the bootstrap for $SO(N)$ vector 4-point functions in general dimension $D$. In the large $N$ limit, upper bounds on the scaling dimensions of the lowest $SO(N)$ singlet and traceless symmetric scalars interpolate between two solutions at $Δ=D/2-1$ and $Δ=D-1$ via generalized free field theory. In 3D the critical $O(N)$ vector models are known to saturate the bootstrap bounds and correspond to the kinks approaching $Δ=1/2$ at large $N$. We show that the bootstrap bounds also admit another infinite family of kinks ${\cal T}_D$, which at large $N$ approach solutions containing free fermion bilinears at $Δ=D-1$ from below. The kinks ${\cal T}_D$ appear in general dimensions with a $D$-dependent critical $N^*$ below which the kink disappears. We also study relations between the bounds obtained from the bootstrap with $SO(N)$ vectors, $SU(N)$ fundamentals, and $SU(N)\times SU(N)$ bi-fundamentals. We provide a proof for the coincidence between bootstrap bounds with different global symmetries. We show evidence that the proper symmetries of the underlying theories of ${\cal T}_D$ are subgroups of $SO(N)$, and we speculate that the kinks ${\cal T}_D$ relate to the fixed points of gauge theories coupled to fermions.

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