The Official String Theory Web Site:--> Cosmology :--> The Big Bang :--> Radiation fills the Universe
Radiation fills the Universe
TIME: between 10-12 and 10-10 seconds
This is
where the Big Bang officially begins. Somehow at the end of the inflationary
era, the Universe was left in a small, hot, dense quantum state. The so-called
vacuum energy of the quantum fields changes into a seething
soup of photons, gluons and other elementary particles. In the Einstein equations
of general relativity, the expansion of the Universe can be driven by energy
density in the form of matter and radiation. During the first phase of the Big
bang, the radiation part of the energy density is so much bigger than the matter
part of the energy density that we can forget matter exists, at least for a
while.
How old is the Universe? // Structure
of the Universe // The Big Bang // Before
the Big Bang? // What about string theory?
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