好神奇，不懂帮顶，话说牛顿时空与相对论时空结构都不同，记得喵喵你好像说过牛顿时空可以看做背景流型上附加纤维丛，而相对论时空是闵氏度规，这还是平直的情况

@Phantom___G

我顶……有人把你的坟贴挖出来，上面说考研的话还得面试什么的……若不符合教授的心意也就不要你，这种情况怎么破

http://en.wikipedia.org/wiki/Emergent_gravity
The concept was originally proposed by Andrei Sakharov in 1967.
Sakharov observed that many condensed matter systems give rise to emergent phenomena which are identical to general relativity. For example, crystal defects can look like curvature and torsion in an Einstein–Cartan spacetime. This allows one to create a theory of gravity with torsion from aWorld Crystal model of spacetime[1] in which the lattice spacing is of the order of a Planck length.