Unstable two-dimensional extremal black holes
نویسندگان
چکیده
We obtain the ǫ < 2 new extremal ground states of a two-dimensional (2D) charged black hole where ǫ is the dilaton coupling parameter for the Maxwell term. The stability analysis is carried out for all these extremal black holes. It is found that the shape of potentials to an on-coming tachyon (as a spectator) take all barrier-well types. These provide the bound state solutions, which imply that they are unstable. We conclude that the 2D, ǫ < 2 extremal black holes should not be considered as a toy model for the stable endpoint of the Hawking evaporation. PACS number(s) : 04.70.Bw, 04.60.Kz, 11.25.Db
منابع مشابه
ar X iv : h ep - t h / 95 10 12 7 v 4 1 4 D ec 1 99 5 INJE – TP – 95 – 8 Two - dimensional extremal black holes
We discuss the two-dimensional (2D), ǫ < 2 extremal ground states of charged black hole. Here ǫ is the dilaton coupling parameter for the Maxwell term. The complete analysis of stability is carried out for all these extremal black holes. It is found that they are all unstable. To understand this instability, we study the non-extremal charged black hole with two (inner and outer) horizons. The e...
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