Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Black Hole Entropy: Is S=A/4 robust ?

  1. Mar 4, 2009 #1
    I would like to use the formula S=A/4 to find the entropy of a black hole. But before I go ahead and believe that formula, there are a couple of subtleties that are troubling me.

    First of all, in just about every "classical" treatment of black hole thermodynamics, there is usually the underlying assumption that the spacetime is 4-dimensional, and asymptotically flat. Does anyone know if the above formula S=A/4 holds in higher-dimensional spacetimes that aren't asymptotically flat?

  2. jcsd
  3. Mar 4, 2009 #2


    User Avatar
    Science Advisor
    2018 Award

    S=A/4 is valid in higher dimensions. I am not sure about asymptotic flatness.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook