Hopf Algebraic Structure for Tagged Graphs and Topological Recursion

Hopf Algebras and Topological Recursion

We consider a model for topological recursion based on the Hopf Algebra of planar binary trees of Loday and Ronco. We show that extending this Hopf Algebra by identifying pairs of nearest neighbor leaves and producing in this way graphs with loops we obtain the full recursion formula of Eynard and Orantin.

Hopf Algebras and Topological Recursion

We first review our previous work arxiv:1503.02993 [math-ph] where we considered a model for topological recursion based on the Hopf Algebra of planar binary trees of Loday and Ronco and showed that extending this Hopf Algebra by identifying pairs of nearest neighbor leaves and thus producing graphs with loops we obtain the full recursion formula of Eynard and Orantin. Then we discuss the algebraic structure of the spaces of correlation functions in g = 0 and in g > 0. By taking a classical and a quantum product respectively we endow both spaces with a ring structure. This is an extended versi…

洗牌代数与多重 zeta 值分数的 Hopf 代数

Hopf algebras for the shuffle algebra and fractions from multiple zeta values

本文通过一族增权线性算子递归定义余积，并借助 Chen 分数及其局部性 Hopf 代数结构，为多重 zeta 值洗牌代数赋予 Hopf 代数结构。

Loday-Ronco Hopf 代数的一种量子化

A Quantization of the Loday-Ronco Hopf Algebra

本文基于 Eynard-Orantin 拓扑递归构造 Loday-Ronco Hopf 代数的量子化 $k[Y^\infty]_h$，证明其 Hopf 代数性质并刻画拓扑递归解空间的商子代数结构。

Generating loop graphs via Hopf algebra in quantum field theory

We use the Hopf algebra structure of the time-ordered algebra of field operators to generate all connected weighted Feynman graphs in a recursive and efficient manner. The algebraic representation of the graphs is such that they can be evaluated directly as contributions to the connected n-point functions. The recursion proceeds by loop order and vertex number.

Field diffeomorphisms and the algebraic structure of perturbative expansions

We consider field diffeomorphisms in the context of real scalar field theories. Starting from free field theories we apply non-linear field diffeomorphisms to the fields and study the perturbative expansion for the transformed theories. We find that tree level amplitudes for the transformed fields must satisfy BCFW type recursion relations for the S-matrix to remain trivial. For the massless field theory these relations continue to hold in loop computations. In the massive field theory the situation is more subtle. A necessary condition for the Feynman rules to respect the maximal ideal and co…