Exact Collapse Solutions in D=4, N=4 Gauged Supergravity and Their Generalizations
| Autor: | Lu, H., Zhang, Xuefeng |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Journal of High Energy Physics 07 (2014) 099 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/JHEP07(2014)099 |
| Popis: | We construct an exact time-dependent solution in $D=4$, ${\cal N}=4$ gauged supergravity, where the gauge fields of the $U(1)\times U(1)$ subgroup of the $SO(4)$ carry independent conserved charges. The solution describes a decaying white hole that settles down to the final state as a static charged black hole. We analyze the global structure and lift the solution back to $D=11$ supergravity. We further extend the theory by adding an extra term in the scalar potential and obtain a more general class of collapse solutions. The result constitutes a charged generalization of the Roberts solution and the dynamical scalar-hairy black hole solutions that have been very recently found by us. The generalized Roberts solutions demonstrate that a scalar coupled to gravity can be unstable even when it is confined by a scalar potential with a fixed point. Comment: 15 pages |
| Databáze: | arXiv |
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