Could Quantum Fluctuations exist W/out the presence of Spacetime?

[Vanilla Gorilla]

TL;DR

I want to know whether Quantum Fluctuations could exist without the presence of Spacetime. Would it be possible, in the event of a Big Rip scenario, and if Spacetime really would get ripped apart, that quantum fluctuations could still occur? And if Spacetime is ripped apart, does that mean the concepts we know as time and space just are not a thing anymore?

I want to know whether Quantum Fluctuations could exist without the presence of Spacetime. Would it be possible, in the event of a Big Rip scenario, and if Spacetime really would get ripped apart, that quantum fluctuations could still occur? And if Spacetime is ripped apart, does that mean the concepts we know as time and space just are not a thing anymore?

 

[EPR]

Your question makes very little sense. Theories are tested by experiment.

If we had such a theory that claimed anything like this(we don't), how would we test said theory given that spacetime is ubiquitous?

 

[Vanilla Gorilla]

I just wanted to know whether or not our theories predict anything about this :)

 

[PeterDonis]

I just wanted to know whether or not our theories predict anything about this

No, they don't. "Big Rip" models don't "rip spacetime apart" and leave something behind. They just say that the universe ends when spacetime gets "ripped apart" (a better term would be "ceases to exist").

 

[Vanilla Gorilla]

Can Spacetime even be ripped apart?

 

[PeterDonis]

Can Spacetime even be ripped apart?

Depends on whether you think a Big Rip model is describing something that is actually possible. Which will in turn depend on which physicist you ask. Nobody is going to be testing such models experimentally any time soon.

 

[Vanilla Gorilla]

Haha, fair enough.