Lorentz invariance and the multiverse, possible or not?

Well, that was sort of the point of the paper, Is Eternal Inflation Eternal? She says no, and the paper developes her position, i.e. past incomplete inflation cannot be future eternal (continue reading her paper and read the footnoted papers as you go

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). She seems to be implying preconditions to the Initial Conditions of Lorentz boosts (big bangs), and mentions a steady state possibility within which the multiverse is perpetuated by the big bangs.

 

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Just to clarify:
QW am I right in saying she is saying "no" if one relies upon currently accepted Einstein theories? Thus either proving a problem with those theories, or eternal inflation is not eternal.

 

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Yes; Einstein's general relativity plays well with the singularity and the spacetime geometry. She points out that Eternal Inflation and the Arrow of Time Theory of bubble universes simply puts the "beginning" farther into the past, but still requires a beginning, something from nothing. She makes reference to the steady state and what I interpret from her paper is pointing to an eternal past of the steady state being required for an eternal future inflation where bubbles inflate within the steady state greater universe.

The reference to tilting at the initial conditions surface being negative and "cuts below the surface of the initial condeitions boundary of eternal inflation that separated inflating from contracting phases of the global De Sitter geometry" has me thinking "overlapping bubbles"

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.

 

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Personally I feel this approach is unecessarily complicated....as I have already suggested the primary premise of relative zero is flawed to begin with.

However to get rid of the relative zeros means significant modification to Einsteins theories and a major shift regarding "light speed invariance" [ which forces Einstein to theorise as he did] and that, I dare say, aint going to happen for some time yet...
Yet Laura Mersini Houghton needs to be congratulated on attempting* to show yet again the problems occurring due to this issue of relative zeros. IMO.

* as no doubt her work will be torn apart and face severe discreditation or most likely simply ignored by those with a vested interest in maintainting the current paradigm.

 

Lol, I agree with you in part. As the standard cosmology and the standard particle models are improved upon, and if the multiverse becomes confirmed by the dark flow, the voids, and the tilting predictions being in line with the positioning of the dark flow within the WMAP data relative to structure of the known universe, then getting back to a steady state cosmology that incorporates the multiverse would be logical.

True it is complicated because getting there has to be done within the scientific community where Lorentz invariance is a foundational postulate. The great minds come together and turn more slowly than the proverbial aircraft carrier changes directions.

 

well .....prove the reality of relative zeros first and you have a starter... bet you can't!!

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If there is immediate overlap of bubble universes which Mersini implies throughout her paper then they are not "zeros" to start with. Proving them to exist would be impossible if they don't exist. However, if the preconditions of big bangs are not net zeros, but bubble overlaps, then there in lies the possibility of the multiverse. Then from within a bubble you might see dark flow imprinted in the background data, and we are seeing it.

 

I understand what you are saying.. I think... however the IF requires that you have relative zeros and that is countered by my point that relative zero is unable to be deteremined with out resorting to the use of an absolute zero which defeats the quest for relative zeros in any t=0 or should I say t=r0 [ r=relative]
You end up with a logical paradox which is no different from "something from nothing" and thus prove "nothing"

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as absolute....hee hee

 

The other issue that comes to mind is that if you assume that indeed bubbles of t=0 overlap as preconditions to a big bang, then the question comes up again, what created the bubble overlap and what was before the bubble overlap? Or do we assume that the bubble overlap is eternally past until we get to the same question regarding what happened before the eternal past etc etc...and created the bubble overlap..

 

I'll explore that a little with you here. Is the "if" I referred to when I said, "If there is immediate overlap of bubble universes which Mersini implies throughout her paper then they are not "zeros" to start with", the same IF you are referring to? No "zeros" necessary then because the universe was never a "zero" to start with and the Lorentz boosts and velocities are not inflating out of "zeros" either, they have preconditions that do not equate to zero anywhere in the infinite past. The past would be complete in that it never began, it has always been ongoing.

If that doesn't address the same "zero" that you are referring to then define "zero" in terms of a universe that has always existed and is characterized by a greater landscape of big bang bubbles that expand and overlap.

 

See post #30.

 

The problem is in the use of logic more than anything else. IMO.
Zero doesn't exist. it can't exist as it is no-thing.

so if you are saying there are no zeros involved then you are saying that there must have been something other than zero. yes?

 

later...thanks for the chat...

 

Thanks, nice chatting with you.

We are well into the philosophical so I am being philosophical when it comes to whether or not zero exists. Philosophically, if zero is the absence of everything, then in an infinite and eternal universe there is no physical place in three dimensions that qualifies as zero. If you are talking about a state of nothingness being the zero state then such a state is precluded by an eternal universe.

On the other hand, if you are not limited to the physical, then zero becomes real in a conceptual sense. One minus one for example begs for the answer to be zero. Would you deny that poor phrase a fulfillment? Give me a zero and make one minus one equal it and I am happy.

 

Getting back to Laura's paper, in the abstract there is a reference Lorentz boosts and to Lorentz invariance and covariance:
http://arxiv.org/abs/1106.3542

Help me explore those references to see if we can describe how the paper addresses them.

http://en.wikipedia.org/wiki/Lorentz_covariance

After reading her paper I would like to hear what you have to say about Lorentz boosts and what her conclusions are about Lorentz invariance and covariance in the multiverse?

 

My theory on Bubble Universe started in 2004. I had Bubble Galaxies, and bubble suns, and right down to bubble atoms. I drew a detailed 3D diagram of the Universe bubbles creating the phenomena that has been indicated in the past month. I'm not trying to promote my theory, just clarify that I am used to thinking along these terms so that I can add my response. My understanding is that multi-verse will push apart just like Galaxies, and other expanding features. However the pressure will make poles through our Universe, and I believe that they have already been hinted at. A slight variation in the grain scale of space time.

 

I remember your art work. It was excellent and something to be proud of. I don't think that your concepts are presented in enough depth to say that they are compatible or not with Mersini's paper, but in a general way your thinking has some correlation with her concepts. For example the "tilt" referred to in one of her footnotes that refers to one of her previous papers, and the cold spot or void as it is referred to. Also, there is a "dark flow" which corresponds to her prediction of the presense of a bubble separate from our own.

 

The major difference is that my entire theory, and all of my predictions were based on a bump gravity, so we shall see.

 

I'll see your bump and raise you an overlap!

Back to my question from a few posts ago about how Mersini uses the concept of Lorentz boost and Lorentz invariance and covariance.

Her reference to Lorentz boosts corresponds to the event the represents the initial conditions of a new bubble universe. Correspondingly, I equate her use of the term Lorentz boost to the concept of multiple big bangs. Using that interpretation each Big Bang gives a Lorentz boost to the new bubble (or arena in my terminology) that establishes an event horizon actuated by the light speed acceleration of the new bubble (Big Bang).

 

Some comments on the peer review process and submission to arXiv:
http://physicsforums.com/showthread.php?t=130842

This discussion was actually an off-shoot from a discussion about an earlier Mersini-Houghton paper about the Arrow of Time and the Cosmological Constant, here: http://www.physicsforums.com/showthread.php?t=130680

Also for reference, the paper about Tilting the Multiverse: Dark Flow
http://arxiv.org/abs/0810.5388