At certain energy levels forces are supposed to take on symmetry and sort of become the same, like the electroweak for example. As I understand this its basically a mechanism that is to aid science understand time leading out from the big bang to possible into it, if not "past" it in some sense. Now I am sure this is to include extant physical theories like QM and relativity. So giving the nature of it all, why would anyone expect the same forces or particles to "cascade" out on symmetry breaking. Does our current universe exclude the possibility of that in some experiment on earth. Such as when we do make an electroweak force, why does it not break down to something strange?

 

I am basically wondering if quantum entanglement may be at work here, or why the universal wave function is even possible to think about, or for that matter why we assume physical laws are homogeneous the universe over. I guess it would be because of the big bang that we have a like universe, but then again why does symmetry breaking in experiments not yield something bizarre?

 

My basic thoughts on the issue is that the universe as it is now dictates what can be "born" into it from a quantum mechanical viewpoint. That when this stuff is occurring, these interactions, they are occurring in a spacetime already fashioned, with matter that is already fashioned, and that for it to exist means it has to be observable, or can interact, and that it has energy has to come into a form that can satisfy such requirements, or that the stuff can be conserved even while its in a sense transforming from something or breaking or gaining symmetry. Could entanglement be a mechanism to explain how energy embedds itself in the existing universe thus stays similar or homogeneous?

The laws of physics being the same at all locations is equivalent to conservation of momentum

 

http://en.wikipedia.org/wiki/Noether's_theorem#Applications