Enhancon and Resolution of Singularity

Details Enhancon and Resolution of Singularity Enhancon and Resolution of Singularity

2001-08-31

arxiv.org/abs/gr-qc/0108084v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, LaTeX, 8 figures, talk at the Meeting of Frontier of Cosmology and Gravitation, Kyoto, Japan, 25-27 April 2001, v2:

Scientific paper

We review the enhancon mechanism proposed by Johnson, Peet and Polchinski. If we consider the D6-brane wrapped on K3, then there appear a naked singularity called ``repulson'' in the supergravity solution. But this singularity is resolved by a shell structure called ``enhancon''. In the interior of the enhancon, the abelian gauge symmetry is enhanced to a nonabelian one, and ordinary supergravity is no more reliable. We also review the interpretation of enhancon as fuzzy sphere. This paper is the contribution to the proceedings of "Frontier of Cosmology and Gravitation", April 25-27 2001, YITP.

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