Determining the Minimal Length Scale of the Generalized Uncertainty Principle from the Entropy-Area Relationship

Details Determining the Minimal Length Scale of the Generalized Uncertainty Principle from the Entropy-Area Relationship Determining the Minimal Length Scale of the Generalized Uncertainty Principle from the Entropy-Area Relationship

2007-09-05

arxiv.org/abs/0709.0581v2

JHEP 0801:034,2008

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, LaTeX, some references added and more explanations on GUP included. Some errors and typos refined. To appear in JHEP

Scientific paper

10.1088/1126-6708/2008/01/034

We derive the formula of the black hole entropy with a minimal length of the Planck size by counting quantum modes of scalar fields in the vicinity of the black hole horizon, taking into account the generalized uncertainty principle (GUP). This formula is applied to some intriguing examples of black holes - the Schwarzschild black hole, the Reissner-Nordstrom black hole, and the magnetically charged dilatonic black hole. As a result, it is shown that the GUP parameter can be determined by imposing the black hole entropy-area relationship, which has a Planck length scale and a universal form within the near-horizon expansion.

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