Free field realization of current superalgebra $gl(m|n)_k$
arXiv:0806.0190 · doi:10.1063/1.2739306
Abstract
We construct the free field representation of the affine currents, energy-momentum tensor and screening currents of the first kind of the current superalgebra $gl(m|n)_k$ uniformly for $m=n$ and $m\neq n$. The energy-momentum tensor is given by a linear combination of two Sugawara tensors associated with the two independent quadratic Casimir elements of $gl(m|n)$.
Latex file, 15 pages