The gl(1|1) super-current algebra: the role of twist and logarithmic fields
Abstract
A free field representation of the gl(1|1)_k current algebra at arbitrary level k is given in terms of two scalar fields and a symplectic fermion. The primary fields for all representations are explicitly constructed using the twist and logarithmic fields in the symplectic fermion sector. A closed operator algebra is described at integer level k. Using a new super spin charge separation involving gl(1|1)_N and su(N)_0, we describe how the gl(1|1)_N current algebra can describe a non-trivial critical point of disordered Dirac fermions. Local gl(1|1) invariant lagrangians are defined which generalize the Liouville and sine-Gordon theories. We apply these new tools to the spin quantum Hall transition and show that it can be described as a logarithmic perturbation of the osp(2|2)_k current algebra at k=-2.
Keywords
Cite
@article{arxiv.0710.2906,
title = {The gl(1|1) super-current algebra: the role of twist and logarithmic fields},
author = {André LeClair},
journal= {arXiv preprint arXiv:0710.2906},
year = {2008}
}