Dark Dancers: When Dark Matter and Dark Energy Dance Together express

Original: "A study of dark matter-dark energy interaction under the DESI DR2 data constraint"

arXiv:2601.19662 · 2026-01-27 · CC BY 4.0 · 1 min

Dark matter and dark energy might be dance partners, not strangers, and this resolves the discrepancy in the expansion rate of the universe.

Galaxies are flying apart, but the expansion rate measured from the afterglow of the Big Bang and from supernova explosions doesn't match: this problem has been called the Hubble tension. It's like two dancers losing their rhythm because they can't feel each other. Edwin Hubble was the first to notice that distant galaxies are fleeing faster.

A new model fixes the dance: dark matter and dark energy are not independent but interact. Then their movements synchronize, and the discrepancy in measurements vanishes.

It was once thought that dark energy was constant, like a metronome. But data from the DESI telescope hints that it's changing its rhythm, like a live musician.

Testing against observations by Adam Riess and early universe data confirms: this kind of interaction makes the cosmos clearer without breaking the rest of the picture.

Whole graph →

Data from the DESI telescope has shown for the first time that dark energy might not be eternal and unchanging: its properties are evolving, meaning the biggest mystery in cosmology might have a solution.

Scientists

Adam Riess Brian Schmidt Edwin Hubble Georges Lemaître Maarten Schmidt Saul Perlmutter

Concepts

interaction model dark energy black hole interaction dark energy lambda cdm ecdm model equation of state parameter cosmological constant problem cosmological data dilaton hubble tension desi cosmic acceleration deceleration negative pressure phantom divide direct detection experiments information thermodynamics euclid quintessence dark sector vacuum energy

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Dark Dancers: When Dark Matter and Dark Energy Dance Together express