Inflation and dark energy have constant energy density - energy is created out of nothing without any source or mechanism?

Asked Feb 25 '18 at 00:32

Active Apr 19 '18 at 11:45

Viewed 177 times

I can understand that a photon in an expanding universe can be redshifted and lose its energy by its wavelength being stretched from space expansion.

But in the case of inflation and dark energy, it doesn’t dilute/decrease with the expansion so that means more energy is created to keep energy density constant.

Doesn’t it need to have a mechanism of creating energy? Or do we think that energy can be created out of nothing without any source or mechanism, like just a spontaneous increase in energy?

edited Apr 19 '18 at 11:45

asked Feb 25 '18 at 00:32

parker

Related: https://physics.stackexchange.com/q/10309/2451 , https://physics.stackexchange.com/q/33404/2451 and links therein. – Qmechanic Feb 25 '18 at 03:58
The simple answer is that energy is not conserved in general relativity. – bapowell Apr 19 '18 at 11:54
Possible duplicate of How is dark energy consistent with conservation of mass and energy? – ProfRob Apr 19 '18 at 12:39

Inflation and dark energy have constant energy density - energy is created out of nothing without any source or mechanism?

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