A stable splitting of factorisation homology of generalised surfaces

Abstract: For a manifold $W$ and an $E_d$-algebra $A$, the factorisation homology $\int_W A$ can be seen as a generalisation of the classical configuration space of labelled particles in $W$. It carries an action by the diffeomorphism group $\mathrm{Diff}\partial(W)$, and for the generalised surfaces $W{g,1}:=(#^g S^n\times S^n)\setminus\mathring D{}^{2n}$, we have stabilisation maps among the quotients $\int_{W_{g,1}} A\,/!/\,\mathrm{Diff}\partial(W{g,1})$ which increase the genus $g$. In the case where a highly-connected tangential structure $\theta$ is taken into account, we describe its stable homology in terms of the iterated bar construction $\mathrm{B}^{2n}A$ and a tangential Thom spectrum $\mathrm{MT}\theta$. We also consider the question of homological stability.