Is Energy Increasing in the Universe?
Posted 28 March 2013 - 12:44 AM
If it is not, Is this decrease in specific energy per unit of space volume occurring by there being ever fewer atoms in each cubic foot of space? Or are there as many atoms per unit volume as ever, but each proton and electron are not as powerful as protons and electrons once were?
An experiment to measure flux density [if that is the correct labeling] would be a problem because we could not know if we were measuring typical space or an eddy of locally lesser or greater than usual energy density.
Posted 28 March 2013 - 10:56 AM
Assuming the big bang is real, the energy released then is the sum total and is being dispersed along with the mass, how would energy increase? Entropy decreases until a static state is achieved.
Posted 28 March 2013 - 03:16 PM
If dark energy is a cosmological constant, the energy density of the universe will asymptote to the current density of dark energy, while the total energy content of the universe increases without bound.
Posted 28 March 2013 - 07:40 PM
Posted 28 March 2013 - 08:26 PM
Care to cite a reference to support this? Otherwise, dark energy would be the new pixie dust...
Complete with equations!
Dark energy aside, energy is not conserved globally in general relativity
in any non-static spacetime because the covariant derivative of the
energy-momentum tensor is not zero.
Posted 28 March 2013 - 08:42 PM
Posted 29 March 2013 - 07:05 AM
But it's not "pixie dust", it is a rigorous hypothesis that does explain real observations. There are some other possible explanations, but none of them have been confirmed, either.
So I would answer the OP's question with "If the dark energy hypothesis is correct, then energy is indeed increasing as the universe expands. But we aren't sure yet."
Posted 29 March 2013 - 09:36 AM
Rigorous of not, there is still no conclusive evidence of the presence of dark matter or dark energy, it make things look good in terms of explaining expansion, but is it still not proven.
Posted 29 March 2013 - 09:46 AM
post thought edit... there is also that thing about the second law of thermodynamcis... which can lead you to conservation of energy.
or sort of... maybe?
Posted 29 March 2013 - 06:02 PM
Posted 31 March 2013 - 06:44 AM
Thanks, New Tesla.
Posted 31 March 2013 - 12:10 PM
See Stoneybrook video at 28 minutes: