The Drinfeld–Kohno theorem for the superalgebra $${\mathfrak {gl}}(1|1)$$

Abstract

We revisit the derivation of Knizhnik-Zamolodchikov equations in the case of nonsemisimple categories of modules of a superalgebra in the case of the generic affne level and representations parameters. A proof of existence of asymptotic solutions and their properties for the superalgebra $gl(1|1)$ gives a basis for the proof of existence associator which satisfy braided tensor categories requirements. Braided tensor category structure of $U_h(gl(1|1))$ quantum algebra calculated, and the tensor product ring is shown to be isomorphic to $gl(1|1)$ ring, for the same generic relations between the level and parameters of modules. We review the proof of Drinfeld-Kohno theorem for non-semisimple category of modules suggested by Geer and show that it remains valid for the superalgebra $gl(1|1)$. Examples of logarithmic solutions of KZ equations are also presented.