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Inflation takes advantage of this possibility... to let gravity be the repulsive force that drove the universe into the period of expansion that we c… - Alan Guth
" "Inflation takes advantage of this possibility... to let gravity be the repulsive force that drove the universe into the period of expansion that we call the Big Bang. In fact, when one combines general relativity with conventional ideas, now, in particle physics there really is a pretty clear indication, I should say, not quite a prediction... that at very high energy densities one expects to find states of matter which literally turn gravity on its head and cause gravity to become repulsive.
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About Alan Guth
Alan Harvey Guth (born 27 February 1947) is an American theoretical physicist and cosmologist. Guth has researched elementary particle theory (and how particle theory is applicable to the early universe). In particular he discovered and developed the theory of cosmic inflation.
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Alan Harvey Guth
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Alan H. Guth
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Additional quotes by Alan Guth
The conventional Big Bang theory does not say anything about what caused the expansion. It really is only a theory about the aftermath of a bang. In the scientific version of the Big Bang, the universe starts with everything already expanding, with no explanation of how that expansion started... So the Scientific version of the Big Bang theory is not really a theory of a bang, it's really a theory of the aftermath of a bang.
A very plausible choice for when inflation might have happened would be when the energy scales of the universe were at the scale of grand unified theories... which unify the weak, strong and electromagnetic interactions into a single unified interaction. ..we're talking about energies which are about 10<sup>16</sup> times the equivalent energy of a proton mass. ...the initial patch would only have to be the ridiculously small size of about 10<sup>-28</sup> cm across to be able to lead ultimately to the creation of everything that we see on the vast scale of which we see it.
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