Discussion of Garfinkle-Horowitz-Strominger Dilaton Black Hole Entropy

摘要

We discuss the entropy of the Garfinkle-Horowitz-Strominger dilaton black hole by using the thin film brick-wallmodel,and the entropy obtained is proportional to the horizon area of the black hole confirming the Bekenstein-Hawking'sarea-entropy formula.Then,by comparing with the original brick-wall method,we find that the resultobtained by the thin film method is more reasonable avoiding some drawbacks,such as little mass approximation,neglecting logarithm term,and taking the term L^3 as a contribution of the vacuum surrounding the black bole,and thephysical meaning of the entropy is more clearer.