A Thought Experiment: Compressing Space Like a Drawstring Bag — Feasibility and Consequences?

P

ptZxB

Registered Member
Hi everyone,
I'm a student with a strong interest in spacetime structure and geometry, and I’ve been thinking about a theoretical idea I’d love to hear your thoughts on.

Is it possible — even just hypothetically — to "fold" or "compress" space into a compact form, something like a spatial pocket or pouch? I imagine it as a region of space that is first locally curved or "folded inward", and then cinched or tightened like a drawstring bag, creating an enclosed pocket of spacetime.

I'm curious:

Could such a structure exist within general relativity or other frameworks?

What would be the geometric or energetic properties of this "bagged" region?

Would the process of compressing space in this way lead to instability, spacetime rupture, or singularities?

Could it be seen as a variant of a wormhole, a bubble universe, or something entirely different?


I’d really appreciate any thoughts, references, or corrections if this idea is already explored somewhere. I know this is a bit speculative, but I’m hoping to learn through discussion!

Thanks in advance!
 
ptZxB said:
Hi everyone,
I'm a student with a strong interest in spacetime structure and geometry, and I’ve been thinking about a theoretical idea I’d love to hear your thoughts on.

Is it possible — even just hypothetically — to "fold" or "compress" space into a compact form, something like a spatial pocket or pouch? I imagine it as a region of space that is first locally curved or "folded inward", and then cinched or tightened like a drawstring bag, creating an enclosed pocket of spacetime.

I'm curious:

Could such a structure exist within general relativity or other frameworks?

What would be the geometric or energetic properties of this "bagged" region?

Would the process of compressing space in this way lead to instability, spacetime rupture, or singularities?

Could it be seen as a variant of a wormhole, a bubble universe, or something entirely different?


I’d really appreciate any thoughts, references, or corrections if this idea is already explored somewhere. I know this is a bit speculative, but I’m hoping to learn through discussion!

Thanks in advance!
Click to expand...
There is something called an "Einstein Rosen bridge," which ticks a few of those boxes.
 
Pinball1970 said:
There is something called an "Einstein Rosen bridge," which ticks a few of those boxes.
Click to expand...
Yes, but the Einstein-Rosen bridge is not quite what I had in mind. Rather, the space is folded into a bubble. Sorry, I don't know how to add images here, but it might be easier to explain with a diagram.
 
ptZxB said:
it possible — even just hypothetically — to "fold" or "compress" space into a compact form, something like a spatial pocket or pouch? I imagine it as a region of space that is first locally curved or "folded inward", and then cinched or tightened like a drawstring bag, creating an enclosed pocket of spacetime.
Click to expand...
Yes. We call this a black hole. The volume around it is so strongly curved that the interior is forever cut off from our universe.
 
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