Decreasing entropy of the universe

[cansay27]

I'm not sure whether this belongs in this topic or Beyond the Standard Model.

I was reading through various articles and threads on this site when I had an epiphany, and now I am curious to see if it could work.

The biggest influence on the fate of the universe is its entropy. Because there is no way to decrease the entropy of a closed system, it must keep increasing until the universe runs out of available energy. My question is this: Could our universe's entropy decrease if it was a part of a much larger system, allowing heat death to be avoided?
Reading the Steinhardt-Turok cyclic model of the universe, I learned that our universe might be a 3-brane floating in a 5-brane, and that other universes could easily coexist just a few Planck lengths away. If there was some particle (dark matter perhaps) that could travel from one brane to the next, is it possible for that particle to carry energy into our brane?

Please forgive me if I am overlooking any details. I am a high school student who is interested in physics, but don't have enough knowledge to figure these things out for myself.

 

[Drakkith]

IF the universe is NOT a closed system, then the laws of thermodynamics would agree with the possibility of deacreasing the entropy of the universe. However, this is highly speculative, so don't assume this to be true or try to push it to be true or anything like that. We have zero evidence for this. CURRENTLY, science believes that the universe is a closed system. It doesn't usually help anything to talk about possibilities without some kind of evidence.

 

[cansay27]

Well plenty of work has been done on M-theory and we have no direct evidence of this, either. According to known knowledge on M-theory, does this work? I guess this is a better question.

 

[Drakkith]

Well plenty of work has been done on M-theory and we have no direct evidence of this, either. According to known knowledge on M-theory, does this work? I guess this is a better question.

I don't see why not.