1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Regarding graviton and negative energy

  1. Jan 8, 2014 #1
    Hi. I recently listened to a lecture by Alan Guth, speaking about cosmological inflation. He made the statement that the energy of a gravitational field is negative (followed by a great thought experiment with a collapsing shell of matter to demonstrate this). I am curious; does this mean that the graviton itself would be a particle made of negative energy?? Perhaps I'm over simplifying.
  2. jcsd
  3. Jan 9, 2014 #2
    No, the potential energy of two particles held by some interaction has nothing to do with the energy of the quanta of the interaction field.
  4. Jan 9, 2014 #3


    User Avatar
    Science Advisor
    Gold Member
    2017 Award

    This is all a bit speculative as we do not yet know whether there is a particle in existence with the actual properties of a graviton. I guess you could say that a graviton, if it existed, would be 'associated with' negative energy - or at least 'subtractive energy'.
    And what about the photon? The exchange of virtual photons is a possible way of looking at the attractive force between opposite charges. Does imply that a virtual photon is "made of negative energy"?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook