Bethe vectors for models based on the super-Yangian Y(gl(m|n))
Pakuliak, S. Z., E. Ragoucy, N. A. Slavnov
Abstract
We study Bethe vectors of integrable models based on the super-Yangian$Y(\mathfrak{gl}(m|n))$. Starting from the super-trace formula, we exhibitrecursion relations for these vectors in the case of $Y(\mathfrak{gl}(2|1))$and $Y(\mathfrak{gl}(1|2))$. These recursion relations allow to get explicitexpressions for the Bethe vectors. Using an antimorphism of the super-Yangian$Y(\mathfrak{gl}(m|n))$, we also construct a super-trace formula for dual Bethevectors, and, for $Y(\mathfrak{gl}(2|1))$ and $Y(\mathfrak{gl}(1|2))$super-Yangians, show recursion relations for them. Again, the latter allow usto get explicit expressions for dual Bethe vectors.