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

I Is causal structure in classical GR still an open area of research?

  1. Apr 12, 2016 #1
    I am currently taking graduate course in GR following Carroll and Wald and we just started covering causal structure. In all my years studying physics this has been the first time something made me stop and go "I would love to spend a decade on this". To me it's a perfect blend of well posed mathematical problems and fundamental questions about reality. However I don't know if this is still an active area of research. If anyone can shed any light on this I would really appreciate it.

    [Moderator's note: edited for spelling of "causal".]
     
    Last edited by a moderator: Apr 12, 2016
  2. jcsd
  3. Apr 12, 2016 #2

    robphy

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    As far as I know, there is some (but not a lot) activity in causal structure in classical GR.
    For example, here are some papers by Minguzzi
    http://arxiv.org/abs/0708.2070
    http://arxiv.org/abs/gr-qc/0703128

    In classical GR, maybe one can try to find ways to weaken the causality conditions to extend various theorems (e.g. singularity theorems).
    In attempts to formulate quantum gravity, there is more activity (e.g. Sorkin's http://en.wikipedia.org/wiki/Causal_sets ; see also Dowker http://arxiv.org/abs/gr-qc/0508109 ).
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Is causal structure in classical GR still an open area of research?
  1. Classical fields in GR (Replies: 16)

Loading...