🌐 De Sitter space: a surprisingly simple explanation for the origin of our Universe

A team of researchers proposes a new vision of the Universe's first moments. Their model eliminates the need for traditional speculative hypotheses.

Cosmologists have long worked with the inflation paradigm, suggesting an ultra-rapid expansion of the Universe. While useful, this model relies on adjustable parameters that complicate its scientific evaluation. The new approach removes these uncertainties by starting from a well-known cosmic state: De Sitter space (see section below).


The team led by Raúl Jiménez developed a theory where the natural quantum fluctuations of spacetime suffice to explain cosmic structure. These gravitational waves, interacting non-linearly, create the complexity we observe today. The model thus avoids resorting to hypothetical fields or particles.

According to the researchers, this proposal stands out for its simplicity and verifiability. It relies solely on gravity and quantum mechanics, two pillars of modern physics. Future gravitational wave observations could confirm or refute this vision.

The implications of this discovery could be profound. By eliminating the need for speculative elements, it offers a clearer picture of the Universe's earliest moments. It's a step toward a purer understanding of the laws governing our cosmos.

This minimalist approach opens a new path for understanding the origin of the Universe. It shows that fundamental principles may suffice to explain cosmic complexity. Scientists eagerly await data that will test this theory.

What is De Sitter space?

De Sitter space is a solution to Einstein's general relativity equations. It describes a universe with accelerated expansion, similar to what we observe today with dark energy. This space features constant positive curvature, without matter or radiation.

In the new model, De Sitter space serves as the starting point. Quantum fluctuations in this space suffice to generate cosmic structures, without requiring inflation.

This approach significantly simplifies our understanding of the Universe's first instants. It directly connects current observations to fundamental physics principles.

How do gravitational waves shape the Universe?

Gravitational waves are spacetime disturbances predicted by Einstein. They propagate at light speed and are generated by violent cosmic events.

In the proposed model, these waves play a key role from the very beginning. Their quantum fluctuations create density differences that evolve into cosmic structures. Over time, they give rise to the galaxies, stars, and planets we observe.