Dark energy mystery: is it just a remnant from the Big Bang?

"By mapping out the three-dimensional positions of galaxies over a large volume of the Universe, scientists within the DESI collaboration have uncovered some (but not overwhelming) suggestive evidence that the strength of dark energy has weakened (and is weakening) over time. Using the feature of baryon acoustic oscillations (BAOs) may be the method of investigation that finally breaks the Standard Model of cosmology, but the picture with constant dark matter and dark energy still remains strong." (Big Think, Ask Ethan: Is dark energy just leftover momentum from the Big Bang?)

If the Big Bang was some kind of series of events. That can explain the dark energy. Dark energy is wave movement whose wavelength and source are unknown. There are multiple theories about the origin of this thing. One of them is that the dark energy is the leftover momentum of the Big Bang. Some other people think that its source is in another universe. 

But that's not the only theory. Researchers made to explain the most dominating effect in the universe. 

Sometimes. Some researchers think that dark energy forms when the universe and its particles spin. If the entire universe spins there is the possibility that the spin of the most out layer in the universe sends energy out from the universe. 

When the energy level in the universe decreases that releases wave movement that is stored in the particles. If we think that there is a so-called Higgs field or base energy field in the universe and the universe's spin speed increases that thing causes an effect that the universe requires some kind of energy source. That energy source can be in the black holes that release energy when the energy level in the universe decreases. Material is one energy form. It's packed wave movement. In the same way, things like superstrings and all materials release energy when their speed decreases. 

There are theories. The particles that form in the cosmic voids can explain the dark energy. When a particle travels in the cosmic voids it can cross a similar particle's maximum speed. So when a photon travels in a cosmic void it travels faster than outside the void. That means when particles come out from the cosmic void, they must release their kinetic energy. Same way wave movement travels faster in the cosmic void. And when the wave movement impacts material that thing releases energy. Same way there are models. High-energy particle impacts like impacting neutrinos are behind dark energy. 

If we think about wormhole theories the wormhole is the tiny tornado that crosses the universe. There are models that the wormhole is actually the superstring. That means the structure is like a tiny energy tornado that seals energy. And maybe the superstrings or wormholes are behind that mysterious effect. When superstrings or tiny energy tornadoes spin they send energy waves into the the Higgs field. That hypothetical wave movement is like thunder in the universe. 

In one model dark energy forms. When particle or wave movement comes out from the wormholes. 

That means that when material comes out from the wormhole it causes energy impulse into the universe. The wormhole brings energy straight from the past to the present. And that can explain the dark energy. But that requires the existence of the wormhole. The energy tornado can be the shortcut to the future. 

When a particle slides through that energy channel that thing locks energy in it. Then that thing comes out from that energy tornado it releases that extra energy. But nobody knows for sure. Dark energy remains a mystery. 

https://bigthink.com/starts-with-a-bang/dark-energy-leftover-momentum-big-bang/