How big did the universe get during inflation?
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According to this paper at the end of inflation the universe's scale factor was about 10−30 smaller than it is today, so that would give a diameter for the currently observable universe at the end of inflation of 0.88 millimeters which is approximately the size of a grain of sand (See calculation at WolframAlpha).
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According to this paper at the end of inflation the universe's scale factor was about. 10^-30 smaller than it is today, so that would give a diameter for the currently observable universe at the end of inflation of 0.88 millimeters which is approximately the size of grain of sand. Source: Size of universe after inflation?
The interpretation of the no-hair theorem is that the Universe (observable and unobservable) expands by an enormous factor during inflation. In an expanding universe, energy densities generally fall, or get diluted, as the volume of the Universe increases.
According to the theory of inflation, the Universe grew by a factor of 10 to the sixtieth power in less than 10 to the negative thirty seconds, so the "edges" of the Universe were expanding away from each other faster than the speed of light; however, as long as those edges can't see each other (which is what we always assume), there is no physical law that forbids it.
During this period, the universe inflated by a factor of 10^26 in a mere 10^-32 seconds — a lifetime compared to the then-age of the universe, but the tiniest sliver of a moment to our more mature...
We are connected to the last tiny fraction of a second of inflation, somewhere between 10 -30 and 10 -35 seconds worth of it. Whenever that time happens to be, where inflation ends and the Big Bang...
After 3 × 10-35 seconds, it would be 8 times its initial distance. After 4 × 10-35 seconds, it would be 16 times its initial distance. And we can continue this as long as we want. After 10-34 ...
According to this paper at the end of inflation the universe's scale factor was about 10 − 30 smaller than it is today, so that would give a diameter for the currently observable universe at the end of inflation of 0.88 millimeters which is approximately the size of a grain of sand (See calculation at WolframAlpha ).
During inflation, the Universe expanded by a factor of about e 60 =10 26.This number is a one followed by 26 zeros. It transcends normal political/economic discussions of inflation. Quantum fluctuations. Let's suppose that before inflating the balloon, I write a message on the surface of the balloon which is so tiny that you cannot read it.
Inflation—it’s not just for governments anymore!1. Last time: Redshift that we see from distant stars shows an expansion of the universe that the Big Bang ca...
2 Answers2. The usual argument is that the net energy of the universe is zero because the positive energy of the matter and photons is balanced out by the negative gravitational potential energy. This would apply to the inflaton field as well.