A general method for constructing logarithmic modules in vertex operator algebra theory is presented. By utilizing this approach,
we give explicit vertex operator construction of certain indecomposable and logarithmic modules for the triplet vertex algebra
W(p){\mathcal{W}(p)} and for other subalgebras of lattice vertex algebras and their
N = 1 super extensions. We analyze in detail indecomposable modules obtained in this way, giving further evidence for the conjectural
equivalence between the category of
W(p){\mathcal{W}(p)}-modules and the category of modules for the restricted quantum group
[`(U)]q(sl2){\overline{\mathcal{U}}_q(sl_2)} ,
q = e
π
i/p
. We also construct logarithmic representations for a certain affine vertex operator algebra at admissible level realized
in Adamović (J. Pure Appl. Algebra 196:119–134, 2005). In this way we prove the existence of the logarithmic representations
predicted in Gaberdiel (Int. J. Modern Phys. A 18, 4593–4638, 2003). Our approach enlightens related logarithmic intertwining
operators among indecomposable modules, which we also construct in the paper.
Mathematics Subject Classification (2000) Primary 17B69 - Secondary 17B67 - 17B68 - 81R10