Relating the Archetypes of Logarithmic Conformal Field Theory

TL;DR

This paper explores the fundamental archetypes of logarithmic conformal field theory, revealing their close relationships and emphasizing the need to find new examples beyond the well-studied models.

Contribution

It provides an algebraic analysis of key models, showing their deep connections and challenging the assumption that these archetypes are representative of the entire theory.

Findings

Archetypal models are closely related.

Many models share similar features.

Further diverse examples are needed.

Abstract

Logarithmic conformal field theory is a rich and vibrant area of modern mathematical physics with well-known applications to both condensed matter theory and string theory. Our limited understanding of these theories is based upon detailed studies of various examples that one may regard as archetypal. These include the c=-2 triplet model, the Wess-Zumino-Witten model on SL(2;R) at level k=-1/2, and its supergroup analogue on GL(1|1). Here, the latter model is studied algebraically through representation theory, fusion and modular invariance, facilitating a subsequent investigation of its cosets and extended algebras. The results show that the archetypes of logarithmic conformal field theory are in fact all very closely related, as are many other examples including, in particular, the SL(2|1) models at levels 1 and -1/2. The conclusion is then that the archetypal examples of logarithmic conformal field theory are practically all the same, so we should not expect that their features are in any way generic. Further archetypal examples must be sought.