1998/09/30 by Yishi Duan, Ying Jiang
Physics and Astronomy · #hep-th
published as Int.J.Theor.Phys. 38 (1999) 563-573 · 12 pages, no figures, LaTeX. Int. J. Theor. Phys., to appear in 1999, No.2
arxiv created 1998/10/08 · arxiv updated 2009/11/30
we present a new topological invariant to describe the space-time defect which is closely related to torsion tensor in Riemann-Cartan manifold. By virtue of the topological current theory and ϕ-mapping method, we show that there must exist many strings objects generated from the zero points of ϕ-mapping, and these strings are topological quantized and the topological quantum numbers is the Winding numbers described by the Hopf indices and the Brouwer degrees of the ϕ-mapping.