论文标题
张量模型中相关函数的斑点拓扑递归
Blobbed topological recursion for correlation functions in tensor models
论文作者
论文摘要
张量模型是矩阵模型的概括,因此,询问它们是否满足某种形式的拓扑递归是一个自然的问题。然而,单位不变的可观察到的世界在张量模型中比在矩阵模型中更丰富。因此,先验尚不清楚哪种可观察物可以满足拓扑递归。几年前,第一作者和达尔托瓦(Dartois)在几年前在四分之一的旋律模型的背景下确定了这样的观察力。证明可以满足Borot引入的拓扑递归的扩展,并称为斑点拓扑递归。在这里,我们表明,这组可观察到的物体存在于任意张量模型中,这些模型具有非差异耦合的四分之一旋速相互作用。它以普遍的方式满足了斑驳的拓扑递归,即独立于其他相互作用的选择。用组合术语,相关函数描述了带有彩色边界组件的填充图。该模型的细节仅出现在填充的生成功能中,而斑点拓扑递归仅要求它们具有明确定义的$ 1/n $扩展。光谱曲线是高斯光谱曲线的不交联,圆柱函数接收了额外的全态部分。通过张量模型作为第一作者Lionni和Rivasseau的多矩阵模型的张力重写作为多矩阵模型来实现此结果。然后,除了进入拓扑递归的自由度外,还可以正式整合所有自由度,这意味着将Feynman图表解释为填充地图。我们进一步提供了新的表达方式,以关联张量和矩阵侧面的$ u(n)^d $ invariant可观测值的期望。
Tensor models are generalizations of matrix models and as such, it is a natural question to ask whether they satisfy some form of the topological recursion. The world of unitary-invariant observables is however much richer in tensor models than in matrix models. It is therefore a priori unclear which set of observables could satisfy the topological recursion. Such a set of observables was identified a few years ago in the context of the quartic melonic model by the first author and Dartois. It was shown to satisfy an extension of the topological recursion introduced by Borot and called the blobbed topological recursion. Here we show that this set of observables is present in arbitrary tensor models which have non-vanishing couplings for the quartic melonic interactions. It satisfies the blobbed topological recursion in a universal way, i.e. independently of the choices of the other interactions. In combinatorial terms, the correlation functions describe stuffed maps with colored boundary components. The specifics of the model only appear in the generating functions of the stuffings and the blobbed topological recursion only requires them to have well-defined $1/N$ expansions. The spectral curve is a disjoint union of Gaussian spectral curves, with the cylinder function receiving an additional holomorphic part. This result is achieved via a perturbative rewriting of tensor models as multi-matrix models due to the first author, Lionni and Rivasseau. It is then possible to formally integrate all degrees of freedom except those which enter the topological recursion, meaning interpreting the Feynman graphs as stuffed maps. We further provide new expressions to relate the expectations of $U(N)^d$-invariant observables on the tensor and matrix sides.