Final 12 months, Professor Richard Lieu proposed that there may very well be gravity occurring even with out mass. This proposal, exterior the standard understanding of physics, was to clarify the results of darkish matter and darkish vitality, two hypothetical options which can be on the cornerstone of the usual mannequin of cosmology. Regardless of their significance, we’ve got not discovered them; some folks recommend that possibly they don’t exist, and the error is in our misunderstanding of what truly does exist.
Lieu now has a follow-up proposal that appears much more dramatic. Dropping the potential for adverse plenty and adverse densities, the professor suggests the existence of transient temporal singularities: mini Massive-Bang-like occasions that may flood the universe with matter and vitality, disappearing simply as rapidly as they type.
“This new paper proposes an improved model of the sooner mannequin, which can be radically totally different,” Lieu, a physics professor at The College of Alabama in Huntsville, mentioned in an announcement. “The brand new mannequin can account for each construction formation and stability, and the important thing observational properties of the enlargement of the universe at giant, by enlisting density singularities in time that uniformly have an effect on all area to switch typical darkish matter and darkish vitality.”
The presence of those singularities would act like darkish matter acts, including an invisible quantity of matter, 5 occasions the quantity of standard matter that we all know off. They might additionally train a adverse stress, similar to darkish vitality does, pushing the universe into an accelerated enlargement.
“Within the present principle, the conjecture is for matter and vitality to seem and disappear in sudden bursts and, apparently sufficient, there isn’t a violation of conservation legal guidelines. These singularities are unobservable as a result of they happen hardly ever in time and are unresolvedly quick, and that may very well be the rationale why darkish matter and darkish vitality haven’t been discovered. The origin of those temporal singularities is unknown – protected to say that the identical is true of the second of the Massive Bang itself.”
Darkish matter and darkish vitality are removed from an ideal principle so it’s good that they’re challenged. Nonetheless, there are factors of Lieu’s concept which can be tough to sq. with observations, just like the existence of galaxies with much less darkish matter or greater than the typical. Additionally, we’d like testable predictions. If we are able to’t see them as a result of they seem and disappear, is there one other method to take a look at their existence?
The research is revealed within the journal Classical and Quantum Gravity.
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