Algebra and Twisted Algebra in Toroidal Target Space

Abstract

Target space duality is reconsidered from the viewpoint of quantization in a space with nontrivial topology. An algebra of operators for the toroidal bosonic string is defined and its representations are constructed. It is shown that there exist an infinite number of inequivalent quantizations, which are parametrized by two parameters $0\le s,t<1$. The spectrum exhibits the duality only when $s=t$ or $-t$ (mod 1). A deformation of the algebra by a central extension is also introduced. It leads to a kind of twisted relation between the zero mode quantum number and the topological winding number.

10 pages, no figures, LaTeX; a small revision is made

References in corpus (2)

• Poisson-Lie T-Duality: the Path-Integral Derivation
• Topology and quantization of abelian sigma model in (1+1) dimensions