Braiding on complex oriented Soergel bimodules

Abstract

In this note, we study U(n) Soergel bimodules in the context of stable homotopy theory. We define the $(\infty, 1)$-category $\mathrm{SBim}_E(n)$ of $E$-valued U(n) Soergel bimodules, where $E$ is a connective $\mathbb{E}_\infty$-ring spectrum, and assemble them into a monoidal locally additive $(\infty, 2)$-category $\mathrm{SBim}_E$. When $E$ has a complex orientation, we then construct a braiding, i.e. an $\mathbb{E}_2$-algebra structure, on the universal locally stable $(\infty, 2)$-category $\mathrm{K}^b_{\mathrm{loc}}(\mathrm{SBim}_E)$ associated to $\mathrm{SBim}_E$. Along the way, we also prove spectral analogs of standard splittings of Soergel bimodules. This is a topological generalization of the type $A$ Soergel bimodule theory developed in a previous paper.