Block Universe Theory: Implications & Multiverse

[Physicuser]

The Block Universe Theory, based on Einstein's Relativity, says that past, present and future exist at the same "time", the universe is static, eternal, and things doesn't change, movement is an ilusion because you have memories from the past. But if the universe don't evolve does this imply that is a mathematical structure like Max Tegmark claims?

How is related this view with the idea of multiverse?

I don't understand the concept very well. In BU (and Relativity), the 4D spacetime is supposed to be a lot of unrelated 3D slices like photograms, and the atoms of one slice are not the same than the previous, or are the atoms "expanded" through the 4th dimension (and are the same in distint places)?

 

[Dale]

But if the universe don't evolve does this imply that is a mathematical structure like Max Tegmark claims?

No. Those are independent hypotheses.

Many scientists take the block universe seriously. I think only one scientist takes the mathematical universe idea seriously.

 

[Ibix]

I don't understand the concept very well. In BU (and Relativity), the 4D spacetime is supposed to be a lot of unrelated 3D slices like photograms, and the atoms of one slice are not the same than the previous, or are the atoms "expanded" through the 4th dimension (and are the same in distint places)?

In the block universe an atom is a 4d structure, like a pipe. The thing you are thinking of as "an atom, now" is a 3d cross-section of the "pipe".

 

[Physicuser]

In some explanations of the concept I read it's said that if you could get out the block (through another dimension or something like that) you could "see" the past and the future. I don't know if this is just a way of explain how the block is or if it's considered a real possibility. What do you think?

 

[Dale]

In some explanations

Please provide a specific reference.

 

[Physicuser]

Please provide a specific reference.

It was in some media coverage like this:

https://plus.maths.org/content/what-block-time

 

[Dale]

I don't know if this is just a way of explain how the block is or if it's considered a real possibility. What do you think?

It was in some media coverage like this:

https://plus.maths.org/content/what-block-time

It is not considered a real possibility. That was primarily a pop-sci mathematical reference talking about the math. Mathematicians frequently do that sort of thing with no known physical application.