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

Uniting quantum physics with the theory of relativity

  1. Aug 16, 2008 #1
    Uniting quantum physics with the theory of relativity is not possible.
    What are the problems / challenge?
     
  2. jcsd
  3. Aug 16, 2008 #2

    ZapperZ

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor

    How do you know it is not possible? If you have solid evidence, you should publish it to stop all of the people currently working towards that end.

    Zz.
     
  4. Aug 16, 2008 #3

    I think he's trying to ask why it's not possible?
     
  5. Aug 16, 2008 #4
    Quark1005 is right

    Uniting quantum physics with the theory of relativity (have so fare not been possible)
    - what is the problem(s) / challenge
     
  6. Aug 16, 2008 #5

    ZapperZ

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor

    But we don't know YET if it is not possible! If it is not possible, we would have stopped looking into it. We have no evidence that it is not possible.

    I think there are several threads in the Beyond The Standard Model forum that have discussed several issues on why and how these two theories diverge from each other. The whole research field on quantum gravity, loop quantum gravity, and even string, are the ones trying to merge GR and QM, or more specifically, with QFT (note that SR is already well-incorporated into QM, so it is misleading to think that all of Relativity is incompatible with QM). If we already know it is impossible, they would have stopped already.

    What you should have asked is why it is DIFFICULT (not "not possible"), for GR and QM to be compatible with each other.

    Edit: There's even a current thread with a discussion on this. You should continue this there.

    https://www.physicsforums.com/showthread.php?t=245316

    Zz.
     
    Last edited: Aug 16, 2008
  7. Aug 16, 2008 #6
    ZapperZ


    It has so fare not been possible because it have been too difficult.
    One day (when we get more holistic knowledge) it is maybe easy (not difficult) but possible.

    GR = Gravity
    QM = Quantum Mechanics
    What does QFT and SR means?
     
  8. Aug 16, 2008 #7
    (at first sorry for my bad english)
    in GR and SR we can easlily measure the position,velocity mass,...
    of a body in a 4 dimensional place called spacetime
    and as we know that the large bodies curved the spacetime
    by gravitational waves, and these waves composed from gravitons
    and we can easily measure the position and other things at the same time
    but in Quantum Theory we cannot measure the momentum and the place of
    a body at the same time and correctly 100%....(Uncertainty Principle)
    other thing: GR describing gravitational force and Quantum theory describing
    other forces as weak/strong forces and electromagnetic force....
    and the electromagnetic force stornger than gravitational force about millions times...
    so it's hard to unit these forces but maybe not possible
     
  9. Aug 16, 2008 #8

    ZapperZ

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor

    GR = General Relativity
    SR = Special Relativity
    QFT = Quantum Field Theory.

    Please continue this in the thread that I've linked. This thread is closed or else there will be way too many parallel threads on the same topic.

    Zz.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?