Energy conservation Archives - Independent physics

Dark energy and the cosmological expansion: Energy conservation, GPE, alternatives to Doppler redshift

Dark energy can be explained through an equivalent energy density of spacetime. This energy density, apparently created ‘from nothing’, may have an origin in the redshift of all forms of energy in the cosmos, by imposing cosmological energy conservation in General Relativity, or by considering the effects of negative gravitational potential energy. Other sources of redshift different from the Doppler effect arise in variable speed of light theories that might resolve the Hubble tension.

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Dark Energy from Cosmological Energy Conservation

The value of the gravitational wave energy density is unknown. Current progress in gravitational wave detection suggests that the energy density of the stochastic gravitational wave background (SGWB) will be estimated in the next decades. We present a derivation of its value under the assumption that energy lost due to cosmic redshift is fully responsible for the energy gained by the cosmological constant in the expanding universe.