If multiple universes exist, would they have the same physical laws ours does?

[Braznor]

So would they differ from ours to a certain extent or be at a completely different level?


Would constants like the speed of light in such universes differ from ours? or would they have nothing like light at all i.e different kinds of energy or matter?


I always wondered about this?

 

[DarkThinker]

Aren't people usually theorizing of multiple universes as being parallel?

 

[CycloWizard]

I'm not an expert, but I did watch a PBS special a few years ago that mentioned this (hopefully that's better than staying at a Holiday Inn Express ). If you believe string theory, then there are branes that dictate the physical constants of our universe. Our universe is relatively 'far' from (or weakly influenced by) the gravity brane, which is why the gravitational force is weak relative to the other fundamental forces.

So, if other universes existed, it would depend on their proximity to the branes that dictate these physical constants.

 

[f4phantom2500]

I think that it would depend on whether or not it was closer to the "center" of whatever the universes would revolve around (assuming these universe clusters are like galaxies or solar systems), and whether or not the universes were in the same dimensions.

 

[CSMR]

Originally posted by: Braznor
So would they differ from ours to a certain extent or be at a completely different level?
Would constants like the speed of light in such universes differ from ours? or would they have nothing like light at all i.e different kinds of energy or matter?
I always wondered about this?

What do you mean by exist? What do you mean by universe?
Isn't the universe defined as everything that exists? That is what makes it universal.

 

[cougar1]

Obviously, the true answer is that I have no idea, but if by multiple universes you are referring to the many-worlds interpretation of Quantum Mechanics, it might depend on which Universe you are referring to.

In the many-worlds interpretation, all possible events do indeed occur, but in separate parallel universes. In this case the properties of a particular "universe" compared to our own would likely depend on the point at which it diverged and its subsequent evolution. The vast majority of these universes would be incredibly similar to ours, since as Statistical Mechanics indicates, our own universe tends to progress along the "most probable path". This means our reality unfolds along the path that is virtually identical (at least on a macroscopic scale) to the most other possible paths. However, in this case there should be a mind-numbingly small number of universes that actually do not follow the most probable path. What this means is that at least for some period these alternate universes would violate the 2nd law of thermodynamics.

As for other physical laws and constants, I would guess that while the vast majority of parallel universes that have diverged recently from our own would have identical physical laws and constants, it is possible that some universes that diverged near the very beginning of the Big Bang (or essentially at the beginning), would have evolved along paths leading to alternate physical laws and constants. Of course none of this is really understood, especially by me, so I could be completely wrong.

 

[PooBeetle]

If multiple universes exist, would they have the same physical laws ours does?

Lets talk sensibly about winning the lottery. it DOESN'T happen. BUT every single one of these physical constants have won the lottery, and it's not just a human scale lotto, but an OPEN ended multi-megaverse lotto, with probabilities essentially incalculably small.

multiple universes exist, this is mathematically proven by "the most probable path" being insanely life oriented. ie a physicist can predict almost any universal constant to unbelievable precision, just by knowing what bounds (limits of the constant) would be considered life oriented. amazing.

the many-worlds interpretation is also the only quantum mechanical theory that is consistent (mathematicaly coherent, doesn't fray at the edges)

So they would have constants that promote self organising order to an insanity. this would be a "Law" of another multiverse. In fact some of these law boundaries have already been mapped (see Kaufman (who basically says most entropy definitions are arse about wrong, the point is increasing order).

it all depends then on your own order/energy equivalence equation. Some, like Kaufman (whom i support) suggest the scales tip in favour of order, others, like classical (non-many worlds physicists)(people who can't do math) physicists suggest entropy definitions that ignore order altogether!

So there's one law for you already.
(weird physics law though if you think about it; life MUST beget life, and then just at least the tiniest little bit more life, to even be considered???)