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13-Inflation (Solution-Inflation (Horizon problem (Before inflation,…
13-Inflation
Solution-Inflation
very early on just after GUT time, a cosmological constant dominated, much larger than todays dark energy
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flatness solved
inflation flattens universe very effectively in a short period of time, as long as energy density during this time is high
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Horizon problem
Before inflation, growth was slow enough that universe could exchange information with itself
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Monopole problem
density decreased with the scale factor, very quickl;y during inflation
further reductions in post inflation expansion means only 1 monopole per 10^82 m^3, larger than volume of observable universe
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Flatness problem
Universe is nearly flat today, and was even flatter in the past
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Horizon problem
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Whole universe was same termperatture within one part in 10^5 despite only points within 1 degree of eachother being causilly connected, in thermal equilibrium