Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1995-08-03
Mod.Phys.Lett. A10 (1995) 3087-3096
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
12 pages, no figures, file in TEX. E-mail: nie@zeus.ccu.umich.mx
Scientific paper
Using a classical action associated to a point-particle in (1+1)-dimensions the classical string theory is derived. In connection with this result two aspects are clarified: First, the point particle in (1+1)-dimensions is not an ordinary relativistic system, but rather a some kind of a relativistic top; and second, through the quantization of such a kind of top the ordinary string theory is not obtained, but rather a $\sigma$-model associated to a non-compact group which may be understood as an extended string theory.
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