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

What is the mechanism for expansion

  1. Feb 10, 2004 #1


    User Avatar
    Gold Member

    if space is expanding and we take it that it is quantasized
    into planckian units of invariant dimensions what is the
    mechanism for expansion, do these planck quanta multiply?
    or have i misunderstood the concept?
  2. jcsd
  3. Feb 13, 2004 #2
    Hi, in LQG the nodes of spin networks carry quantities of volume associated to them, so you must to understand firstly what an spin network is: a collection of edges and nodes forming a graph
    Anyway this graph is not still: Is always evolving thanks to the Hamiltonian constraint, that guides his evolution, so new nodes can appear in the graph (and then new quantized cells of volume). Also, think that a node that was originating a quantized cell of space can then enter inside of an object and give to it some quantity of volume (this has been called by some authors as Einsteinian alchemy)
    Last edited: Feb 13, 2004
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook