In early 1995, Ted Jacobson found an intriguing way to “localize” the relationship between the temperature and entropy on one side, and the acceleration and areas on the other side. In fact, he derived Einstein’s equations from a well-known thermodynamic equation. See also Einstein’s equations as equations of state.
— Event horizons and thermodynamics: more than an analogy
— Lubos Motl
2013.04.29 Monday ACHK