Rediscussion of charged dilaton-axion black hole entropy

• Authors: Chunyan Wang , Yuanxing Gui
• Languages of publication: EN

Abstracts

EN

We rediscuss the entropy of a charged dilaton-axion black hole for both the asymptotically flat and non-flat cases by using the thin film brick-wall model. This improved method avoids some drawbacks in the original brick-wall method such as the small mass approximation, neglecting the logarithm term, and taking the term L
3 as the contribution of the vacuum surrounding the black hole. The entropy we obtain turns out to be proportional to the horizon area of the black hole, conforming to the Bekenstein-Hawking area-entropy formula for black holes.

Keywords

EN

charged dilaton-axion black hole; thin film brick-wall model; entropy; cut-off

Discipline

• 04.: General relativity and gravitation(for astrophysical aspects, see 95.30.Sf Relativity and gravitation; for relativistic aspects of cosmology, see 98.80.Jk; for special relativity, see 03.30.+p)
• 04.62.+v: Quantum fields in curved spacetime
• 04.70.-s: Physics of black holes(see also 97.60.Lf—in astronomy)

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2009
• Volume: 7
• Issue: 3
• Pages: 521-526

Dates

published

1 - 9 - 2009

online

25 - 6 - 2009

Contributors

author

Chunyan Wang

• School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, Liaoning, 116024, P. R. China

author

Yuanxing Gui

• School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, Liaoning, 116024, P. R. China

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Identifiers

DOI

10.2478/s11534-009-0011-2