Is Energy Truly Conserved in an Expanding Universe?

[zeromodz]

I realized that if right now, energy is being lost forever by traveling across our Hubble volume. That energy will never reach us because no information can travel faster than c except the expansion of space. So in that sense, that energy is truly lost forever from our perspective. Maybe the zero energy universe was never really zero. Maybe it started off with negative energy expanding faster than c so it could never cancel out with the positive energy. Therefore, we have a universe with a positive amount of energy only because the negative energy traveled faster than c during inflation. What do you think?

 

[Dale]

Why are you making two threads with almost the same topic at the same time?

 

[zeromodz]

Why are you making two threads with almost the same topic at the same time?

They are not on the same topic, one is about how the expansion of space can support the contribute the conservation of energy and the other is about the creation of the universe idea of negative energy not being able to cancel out.

 

[Dale]

They are both questions on conservation of energy in the FLRW metric. They are essentially the same question and the answer is essentially the same: energy is conserved locally in GR, but in a non-static metric it is not even well defined globally.