中文摘要：

We propose a new picture of black holes through a special holographic screen.This holographic screen contains all the degrees of freedom of a black hole.We find that this holographic screen is similar to the ordinary thermodynamic surface system.Meanwhile,through the 'white-wall box' and the formula of sound velocity,we find some similarities between gravitons and photons.We further assume that such a holographic screen is a kind of Bose-Einstein condensate of gravitons.Through this assumption and those similarities,we finally get the area law of static black holes.

英文摘要：

We propose a new picture of black holes through a special holographic screen. This holographic screen contains all the degrees of freedom of a black hole. We find that this holographic screen is similar to the ordinary thermodynamic surface system. Meanwhile, through the ＂white-wall box＂ and the formula of sound velocity, we find some similarities between gravitons and photons. We further assume that such a holographic screen is a kind of Bose-Einstein condensate of gravitons. Through this assumption and those similarities, we finally get the area law of static black holes.