MessageToEagle.com

Supercomputer Solves The Space-Time Dimensionality Riddle

11 June, 2012

MessageToEagle.com - We know we live in a 3-dimensional world, but the Universe was born with 10 dimensions. So, where are those hidden dimensions?

The question has been a big mystery to physicists, but a supercomputer simulating the Big Bang has finally solved what is known as the string theory.

According to Big Bang cosmology, the universe originated in an explosion from an invisibly tiny point. This theory is strongly supported by observation of the cosmic microwave background2 and the relative abundance of elements. However, a situation in which the whole universe is a tiny point exceeds the reach of Einstein's general theory of relativity, and for that reason it has not been possible to clarify how the universe actually originated.

In superstring theory, which is considered to be the "theory of everything", all the elementary particles are represented as various oscillation modes of very tiny strings

Among those oscillation modes, there is one that corresponds to a particle that mediates gravity, and thus the general theory of relativity can be naturally extended to the scale of elementary particles.

Therefore, it is expected that superstring theory allows the investigation of the birth of the universe. However, actual calculation has been intractable because the interaction between strings is strong, so all investigation thus far has been restricted to discussing various models or scenarios.

Superstring theory predicts a space with 9 dimensions3, which poses the big puzzle of how this can be consistent with the 3-dimensional space that we live in.

A group of 3 researchers, Jun Nishimura (associate professor at KEK), Asato Tsuchiya (associate professor at Shizuoka University) and Sang-Woo Kim (project researcher at Osaka University) has succeeded in simulating the birth of the universe, using a supercomputer for calculations based on superstring theory.

This showed that the universe had 9 spatial dimensions at the beginning, but only 3 of these underwent expansion at some point in time.

In this study, the team established a method for calculating large matrices (in the IKKT matrix model4), which represent the interactions of strings, and calculated how the 9-dimensional space changes with time. In the figure, the spatial extents in 9 directions are plotted against time.

Invisible dimensions cannot be seen with the naked eye.

If one goes far enough back in time, space is indeed extended in 9 directions, but then at some point only 3 of those directions start to expand rapidly. This result demonstrates, for the first time, that the 3-dimensional space that we are living in indeed emerges from the 9-dimensional space that superstring theory predicts.

This calculation was carried out on the supercomputer Hitachi SR16000 (theoretical performance: 90.3 TFLOPS) at the Yukawa Institute for Theoretical Physics of Kyoto University.

It is almost 40 years since superstring theory was proposed as the theory of everything, extending the general theory of relativity to the scale of elementary particles. However, its validity and its usefulness remained unclear due to the difficulty of performing actual calculations. The newly obtained solution to the space-time dimensionality puzzle strongly supports the validity of the theory.

MessageToEagle.com

See also:
Big Bang Machine Discovers Unknown Particle

Follow MessageToEagle.com for the latest news on Facebook and Twitter !

Don't Miss Our Stories! Get Our Daily Email Newsletter

Enter your email address:


Once you have confirmed your email address, you will be subscribed to the newsletter.

Recommend this article:

No Empty Space In The Universe - Dark Matter Fills The Intergalactic Space

Black Gaps In The Sky Puzzle Astronomers

Mysteries Of A Dark Universe

Peculiar Nebulous Objects

Countless Trillions Of Glowing Orbs That Illuminate The Universe

Mysterious Dark Matter

Mysterious Flares Emitting From Sagittarius A

Subscribe To Our Space, Astronomy, Astrophysics, Earth and Xenology News!

Grab the latest RSS feeds right to your reader, desktop or mobile phone.

Subscribe to RSS headline updates from:
Powered by FeedBurner

Go to - MAIN PAGE

Copyright @ MessageToEagle.com All rights reserved.
Go to - MAIN PAGE

 Subscribe in a reader

Join Us On Facebook!


Other Popular Articles

Abnormal Star Discovered In The 'Forbidden Zone'
A team of astrophysicists from Germany, France and Italy have discovered in the constellation Leo is an old star. The star's existence raised at once many questions for scientists. The object is definitely not as its "contemporaries" that appeared immediately after the Big Bang event.


Thermonuclear Burning In A Neutron Star Detected For The First Time!
It's a very important discovery! For the first time, an international team of scientists have detected all phases of thermonuclear burning in a neutron star, located close to the center of the galaxy in the globular cluster Terzan 5.

Doesn't Secret Dark Matter Exist?
The more scientists study dark matter they know lesser and are not particularly optimistic about their results.
After completing this study, we know less about dark matter than we did before," said Matt Walker, of the Harvard-Smithsonian Center for Astrophysics.
A mysterious and still unknown substance is totally invisible in the Universe and reveals its presence only through its gravitational pull...

Earth Is In The Middle Of A Space-Time Vortex
Earth sits in the middle of a space-time vortex. Einstein predicted this almost 100 years ago and he was right. Space-time around Earth seems to be distorted, just a general relativity predicts.

The Eyes Of A Future Alien Astronomer - What Will They See?
Have you ever wondered what the Universe will look like for a future alien astronomer?
It will in fact be entirely different from what it is today. One trillion years from now, an alien astronomer in our galaxy will have great difficulties figuring out how the universe began.
The Milky Way will have merged with the Andromeda galaxy to form the Milkomeda galaxy. Many of its stars, including our Sun, will have burned out.

Violent Dragon Clash Billions Of Years Ago
NGC 5907 is sometimes called the "Splinter" or Knife Edge Galaxy because of its unusual appearance. It is a spiral galaxy lying in the Dragon constellation, about 40 million light-years from Earth that could have been formed through a gigantic collision of galaxies, 8 to 9 billion years ago.

Researchers Developed A Very Accurate Map Of Milky Way's Magnetic Field
The Milky Way is hard to map because we are sitting on the edge of the galaxy looking through it. However, we know that spiral galaxies like the Milky Way have magnetic fields that follow a particular pattern so we were able use polarised light to map the magnetic fields...

W3Counter