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

Deriving GR from maximum power

  1. Aug 11, 2011 #1


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    MTW has a cute argument on p. 980 that the maximum power radiated from any system is a fixed number, about 10^53 W. I came across this and filed it away as a piece of cool trivia. But it turns out that apparently you can derive the GR field equations from nothing more than the assumption that there is a maximum power across any surface:

    Jacobson, "Thermodynamics of spacetime: the Einstein equation of state," PRL 75 (1995) 1260, http://arxiv.org/abs/gr-qc/9504004

    C. Schiller has made an attempt to present this at a lower mathematical level in Motion Mountain, v. II, ch. 4: http://motionmountain.net/

    Schiller's treatment, unforunately, seems to veer wildly between different levels of sophistication, and I wasn't able to make much of it.
  2. jcsd
  3. Aug 11, 2011 #2

    Ben Niehoff

    User Avatar
    Science Advisor
    Gold Member

    That's really cool.
  4. Aug 11, 2011 #3


    User Avatar
    Science Advisor

    Related: Padmanabhan, Gravity: The Inside Story, http://www.gravityresearchfoundation.org/pdf/awarded/2008/Padmanabhan_2008.pdf [Broken]
    Last edited by a moderator: May 5, 2017
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook