# On the quantum affine vertex algebra associated with trigonometric $R$-matrix

## TL;DR

This paper establishes a correspondence between $$-coordinated modules of quantum affine vertex algebras and modules of quantum affine algebras, revealing their equivalence in irreducibility and exploring their centers.

## Contribution

It introduces a new framework connecting $$-coordinated modules with quantum affine algebras, expanding understanding of their structure and relations.

## Key findings

- $$-coordinated modules are equivalent to quantum affine algebra modules
- Irreducibility of modules is preserved between the two structures
- Relations between the centers of quantum affine algebra and vertex algebra are discussed

## Abstract

We apply the theory of $\phi$-coordinated modules, developed by H.-S. Li, to the Etingof--Kazhdan quantum affine vertex algebra associated with the trigonometric $R$-matrix of type $A$. We prove, for a certain associate $\phi$ of the one-dimensional additive formal group, that any $\phi$-coordinated module for the level $c\in\mathbb{C}$ quantum affine vertex algebra is naturally equipped with a structure of restricted level $c$ module for the quantum affine algebra in type $A$ and vice versa. Moreover, we show that any $\phi$-coordinated module is irreducible with respect to the action of the quantum affine vertex algebra if and only if it is irreducible with respect to the corresponding action of the quantum affine algebra. In the end, we discuss relation between the centers of the quantum affine algebra and the quantum affine vertex algebra.