Mirror effect induced by the dilaton field on the Hawking radiation

Kengo Maeda, Takashi Okamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A "stringy particle" action is naturally derived from Kaluza-Klein compactification of a test string action coupled to the dilaton field in a conformally invariant manner. According to the standard procedure, we perform the second quantization of the stringy particle. As an interesting application, we consider evaporation of a near-extremal dilatonic black hole by Hawking radiation via the stringy particles. We show that a mirror surface which reflects them is induced by the dilaton field outside the the horizon when the size of the black hole is comparable to the Planck scale. As a result, the energy flux does not propagate across the surface, and hence the evaporation of the dilatonic black hole stops just before the naked singularity at the extremal state appears even though the surface gravity is non-zero in the extremal limit.

Original languageEnglish
Title of host publicationAlbert Einstein Century International Conference
Number of pages6
Publication statusPublished - 2006
Externally publishedYes
EventAlbert Einstein Century International Conference - Paris, France
Duration: 2005 Jul 182005 Jul 22

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


ConferenceAlbert Einstein Century International Conference


  • Dilaton
  • Hawking radiation
  • String

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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