论文标题
黑洞熵和长弦
Black hole entropy and long strings
论文作者
论文摘要
我们讨论黑洞熵是量子重力中的短还是远距离微晶体。在砖墙和诱导的重力模型中，由于在普朗克长度上切断的事件范围内的短距离相关性而产生的熵产生。但是，与黑洞能量相比，这些短范围的自由度的能量太高了。我们认为，自然出现在基质量子力学中的长弦现象通过降低每个自由度的激发能量来解决此问题。该机制还减少了给定体积中微观自由度的总数，从而正确估计了黑洞熵的Bekenstein-Hawking公式。
We discuss whether black hole entropy counts short or long range microstates in quantum gravity. In brick wall and induced gravity models the entropy arises due to short distance correlations across the event horizon cut off at the Planck length. However, the energy of these short range degrees of freedom is too high compared to the black hole energy. We argue that the long string phenomenon, which naturally appears in matrix quantum mechanics, resolves this issue by lowering the excitation energy per degree of freedom. This mechanism also reduces the total number of microscopic degrees of freedom in a given volume, leading to a correct estimate of the Bekenstein-Hawking formula for black hole entropy.
