So parallel universes really do exist?

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My dreams range from everyday reality (with things changed slightly) to science fiction meltdown. Seems like I experience travel to these alternate realities/universes simply by going to sleep and waking up again.

Wow, a thread that begins with parallel universes and end with the moon. An epic involving thousands of light years.

It seems that that parallel universe stuff stems from Feynman's assertion that the photon in the double slit experiment takes the average all possible paths. Then there was string theory with 10 or 11 dimensions. So these strings amass themselves into branes which float in a higher dimensional space. So perhaps our universe, being a 4 brane, with 3 spatial and one time dimensions, floats with it's sibling universes in 5 - 11 dimensional space. And where do these universes come from? Why bifurcation in time of course.

This stuff gives me nightmares. Sometimes I'll be driving down the road and I imagine a tractor-trailor truck coming across the center barrier and hitting me head on. Invariably I'll consider that this probably did happen in another universe that split off when I considered the event which did not happen. With infinite time, and space confined to my particular brane (although my brane has infinite space but just not in as many dimensions as the higher dimensional space in which all the brane universes float), probability admits that anything can happen.

And if you want to have a really interesting discussion, what is space? How many dimensions are there really? Does space come in quantums; in particles? There is a theory that 6 higher dimensions are to be found in space particles which have a Calibri-Yau topology which ties into string theory. What is space? Is there an outside of space? And also, doesn't spooky action at a distance seem to deny the space between the two entangled particles? Maybe we see particle A and particle B as being entangled only because we are not privy to that dimension in which the supposedly entangled partilcles are revealed to be the same single particle?

According to the science channel universes are packed like eggs in the same carton cheek by jowel. Dozens, hundreds, infinite numbers, in every direction.

And one astronomer claimed that galaxies in this universe cluster to one side of this universe because they are being attracted the gravity of the adjacent universe ( like a magnet reacts to the studs hidden in your living room wall).

My own opinion? I think that that astronomers has gotten his universes scrambled!

Lol!

Last edited by naturalplastic on 10 Nov 2014, 1:22 pm, edited 1 time in total.

I think that I'll stick with this universe for right now.

It's not about budgetary constraints. If mankind put all it's differences aside, all it's conflicts and united for the greater good, if we put all our efforts together, all our resources, if everyone on earth worked for the same goal, we could colonize Mars by 2020, the solar system by 2030, and be exploring different galaxies by 2050 and travelling faster than light in hyperspace. Sadly humans and our own volatile natures will never allow that.

who here knows about how and why some of the smart set says that our universe is a holographic projection of a higher-dimensional reality?

I've also heard some who believe that the very nature of our existence, the very fabric of everything that surrounds us, event space itself is not a thing but literally digital information.

Some have even postulated that what we perceive as our "universe" is actually a fantasy realm formed by the consensus imaginings of a group of gamers sitting around a table with their books, dice, and miniature figurines.

It said that the universe is expanding. What is the universe expanding into? What is beyond our universe if there is a beyond?

You claim "The would violate several physical conservation laws." How would it do so? We're talking about the law of conversation and mass right?

Since the universe, by definition, is all that exists, it has to expand into nothing, strictly speaking. However, there is a problem with nothing. It doesn't exist. I don't think you'll find it anywhere, in which case something is everywhere in all directions in some form or another, but this is absurd ... the stuff madness is made of.

In my heart, I truly feel that we must make the attempt to travel to these places. Maybe no "conservation laws" will be violated--or maybe we could make it so we don't "violate" those laws.

"we must make the attempt to travel to these places"

Of course it would be impossible with what we currently know. But Aspies have been making progress on this since day 1.

There's wormholes, where gravity bends space to such an extent that one area can be immediately joined to a distant area by cutting off the oxbow in bent space.

Then there's the fact that we know approximately zero about space; the distances that separate us from the crab nebula.

What if space turns out to be an important something rather than a nothing. We do know that space is inextricably joined with time, due to relativity, and that time does not flow backwards (but we can't figure out why not). We know that space seems to prohibit two things occupying the same space at the same time.

But what is the nature of quantum entanglement? Spooky action at a distance; you perform an action on one right here and the action's result is mirrored over there. Are these really two things separated in space or is it that we just can not comprehend how they are the same thing with no intervening space (perhaps if we could see a 5th or 6th spatial dimension we might see them as the same thing there.

Perhaps entanglement is like a horseshoe standing on its end in a putative 2 dimensional universe. We would see the imprint of the two ends of the horseshoe in the 2 dimensions. But when we tapped the U of the horseshoe with a hammer, both 2 dimensional imprints will show the effect of the vibration. Why? Because it's the same object when seen in a higher, three spacial universe. Have you ever read "Flatland", a book that explores how things would look in lower dimensions?

Finally, there's teleportation. They've done that for considerable distances for tiny tiny particles. I sometimes think that that might be how humanity came about. John A Wheeler of Princeton has a saying "it from bit", meaning stuff develops from information. He believes all of physics comes down to information. Information can be transmitted with radio waves, light waves, and who knows how many other wave types. Perhaps an advanced civilization (AKA God) broadcast the instructions for life throughout the universe, conquering the limitations of space and time. Maybe we are information probes, gathering data for the broadcasters and at death we transmit the info back to the father race.

So as soon as someone makes one of these methods work, we are stuck in our own solar system . But that's really good, because, knowing nothing, we can imagine everything I like fun thoughts.

If by definition the universe is all that exists then how is there anything for it to expand into? If there is truthfully nothing for it to expand into by definition then how is the universe expanding unless I'm misapplying the concept of expanding in this case.

"Since the universe, by definition, is all that exists, it has to expand into nothing, strictly speaking."

We know so little about spacetime. Time disappears if you do not consider relationships between things; ditto space. Why should spacetime be a property of stuff, like that? And what do we have in those places where there is no stuff, if such places exist?

Nobody knows.

Both quantum theory and general relativity predicts the existence of parallel universes which is quantum physics may be responsible for the wavelike nature of subatomic particles such as electrons as described in the Many worlds intepretation which as got some following among theoretical physicists. General relativity on the other hands predicts that wormholes can lead to differnt universes or different parts of the universe. The wormholes connecting to a potential parallel universe would be an Enstein Rosen Bridge which actually may not be transversible.

There are two proposed candidates for a 'quantum theory of general relativity and both of these have at their heart are multiple dimensions. In which or 3 dimensions space and including Albert Einstein's 4th dimension which is time but in String theory and later M theory predicts that the universe has 10 dimensions of which 6 are compactified to a small distance on the scale of the Planck length which are the freedoms of vibrations of energy that are one dimensional and can have up to six degrees of of freedom and the way these strings vibrate corresponds to the particles and waves that we and the rest of the universe are made of some consist of open and closed strings some consist of tachyons (particles or objects that can travel at superluminal speeds and have an imaginary mass over all the number of string theories turned out to be 5 which was reduced down to one bu adding an extra dimension by imagining what happens if you stretch a string and add an extra dimension? you creat a membrane or Brane (pronounces brain but short for membrane why the different spelling. These membranes can in fact be inreased to cosmic sizes and in fact are parallel universes in their own right. All these multiverse theories does sound very much like territory touched on by religion as well.