Skip to: Content
Skip to: Site Navigation
Skip to: Search


Did the universe begin as a slender thread?

A new framework for the universe's formation suggests that it began as a single thready line, then evolved into a plane, and only then the three-dimensional space we now inhabit. This could simplify sticky cosmological questions, including dark matter and gravity waves.

By Staff writer / April 22, 2011

Hubble's deep view of the sky showed myriad galaxies, reaching back to the early history of the universe. The image was assembled from several different exposures taken over 10 days in December 1995. A new proposal suggests that the universe evolves dimensions over time, and that so-called 'dark energy' may be a result of the new fourth dimension.

Robert Williams and the Hubble Deep Field Team / NASA / File

Enlarge

A universe expanding faster than it ought to be? What's up with that?

Skip to next paragraph

To Dejan Stojkovic, the phenomenon astrophysicists discovered in 1998 and labeled "dark energy" may not be as complicated a puzzle as many scientists make it out to be.

Instead, he suggests, it's the signal that a fourth dimension – beyond the height, width, and depth humans are geared to experience – has opened up in a universe that is adding physical dimensions as it evolves.

IN PICTURES: Images from the Hubble Telescope

This possible explanation for dark energy results from applying a new "framework" for looking at the evolution of the universe that he and colleagues have developed over the past two years. Working backwards in time, the concept also implies that the universe did not begin its existence in a three-dimensional form, but as a one-dimensional structure that added dimensions as it evolved.

Some support for this may be found in high-energy cosmic rays, according to Dr. Stojkovic, a physicist at the State University of New York at Buffalo, who along with colleagues first proposed the idea last year.

In a paper published recently in Physics Review Letters, Stojkcovic and colleague Jonas Mureika of Loyola Marymount University in Los Angeles write that further tests of the framework's validity could come from the Large Hadron Collider in Geneva as well as from planned space missions to detect gravity waves thought to be rippling through the cosmos.

If he and his colleagues are correct, Stojkovic says, their work could help break a 30-year logjam in efforts to demonstrate that the four fundamental forces in nature – electromagnetism, the weak force (governing radioactive decay), the strong force (binding atomic nuclei), and gravity – are low-energy relics of one unified force that briefly held sway over the cosmos during the first, tiniest fractions of a second after the big bang.

The big bang is a sudden release of an enormous amount of energy that physicists and cosmologists credit with giving birth to the universe some 13.8 billion years ago.

Gravity remains the stubborn hold-out in this grand-unification effort. It's the only one of the four forces that has defied an explanation within the so-called standard model of physics. As the decades have passed, many researchers have developed ever more complicated ideas to fit gravity into the quantum-physics world inhabited by the rest of the forces and their associated subatomic particles. Scientists' calculations suggest that the solution may lie in "new physics" – beyond the standard model.

Stojkovic is part of a subgroup of physicists collectively tapping their "new physics" colleagues on the shoulder and saying: The solution many not require new physics at all, but merely a new way of looking at the standard model.

"The standard lore for years was to make things more complicated, introducing more structures, more particles, extra dimensions," says Stojkovic, a physicist at the State University of New York at Buffalo. His work "is quite the opposite. This is saying no, no, no, we don't need anything else. We don't need more dimensions" in the early universe, as some propose. "We need less dimensions," he says.

Permissions

Read Comments

View reader comments | Comment on this story