Wednesday, February 25, 2009

Epoch of Inflation

Epoch of Inflation
Even with the Big Bang Theory well illustrated, it still remains a wonder what happened before 10-43 of a second. And our theory of creation is not complete until it can describe all the way up to and including the beginning. 10-43 second is not the beginning. Even Ed of Ed, Edd, and Eddy knows that. Conditions before 10-43s were however so extreme hat our ordinary laws cannot explain them. Theory suggests that the universe was even hotter and much denser. Astronomers call the period, Inflation period. Several theories called the Inflationary Universe Theories have been proposed attempting to describe it. These theories suggest that in the very young universe forces of nature acted very differently from the way act in the normal space time. The first IUT was proposed by the American scientist Alan Guth in 1990. Since then 50 others have emerged.

In the very early universe conditions with the universe extremely small, it'd require application of quantum theory that is applied in studying subatomic particles. And in the subatomic world understanding behavior or even quantities of matter becomes so difficult that rather than approximating the values we settle for probabilities of given values being correct. In this small world, even the much praised laws of Newton become futile (poor boy, I hope he never learns that). For example when applied to the structure of an atom, it would mean that the electromagnetic force between the nucleus and the electron draws the latter inwards such that the electron collapses! Yet in normal cases electrons maintain steady orbit around the nucleus.

Inflationary universe
According to one inflationary theory, gravity was part of one single force-the Grand Unified Force. This GUF must have been responsible for the expansion of the universe. In theory high energy changes response of matter to force. As the universe expanded and cooled to below 1027K, the forces separated to a mixture of four forces by symmetry breaking producing what is known as the "False Vacuum". This is a vacuum with not zero pressure rather negative pressure. This means that as it expands it releases energy. It also had negative gravity; which rather than being an attractive force was a repulsive force! This repulsive force must have led to expansion of the universe in the earliest time of the Big Bang.

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