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What is the mechanism for expansion 
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#1
Feb1004, 04:32 AM

PF Gold
P: 3,682

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
Feb1304, 04:27 PM

P: 915

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) 


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