All Questions
Tagged with time cosmological-inflation
13
questions
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Multiple time dimensions in the eternal inflation model
From a lecture by Prof. Kaiser, I reckoned that according to the Eternal Inflation model, it is possible that all of the 10500 topologies posited by string theory could exist somewhere in the region ...
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4
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1
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Intuitive explanation of COSMIC TIME?
I came across the following statement, while studying a Newtonian model for cosmic expansion:
"If $R(t)$ is the scaling factor, we can define the Hubble parameter as $H(t)=\frac{\dot{R(t)}}{R(t)}...
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7
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Are Laws of nature independent of time? [duplicate]
There are certain laws that govern the universe and these laws make up the fundamentals of any physical observation. But were these laws present the way there are now since the beginning of space time,...
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3
votes
1
answer
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Time between Big Bang and 'now'
To point at first my question has a part of trying to make a concept and is not about was there a Big Bang or not. We accept expansion so it is right to think about a starting point of expansion and I ...
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If Time and Space are intrinsically linked and space is ever expanding then surely time is slowing down [duplicate]
When we try to imagine the initial expansion after the big bang we see with the CMB that the universe went from initially smaller than a hydrogen atom to what we see today. However, when we try to ...
4
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0
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Expansion of the time dimension [duplicate]
Given that the universe is expanding in the three spatial dimensions, is it possible that the time dimension is also changing over time?
If the rate of the passage of time is changing over time, ...
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1
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1
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118
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How do we understand time & size in the earliest moments of the universe?
1) I don't know whether this question should belong to this site: please correct me if not.
In the earliest moments of the universe history probably all fundamental forces where indistinguishable: in ...
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0
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144
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If time was speeding up, would it look like inflation?
The rate at which time passes depends on the gravitational potential.
From Wikipedia: "This is a direct result of gravitational time dilation - if one is outside of an isolated gravitational source, ...
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2
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1
answer
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The Big Crunch and perceived entropy
I'm aware of the Big Crunch theory, that once at capacity, the universe may collapse in on itself. Hawking once theorized that time may go backwards during this crunch. So, that got me thinking: how ...
-2
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1
answer
278
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How long did it take for the universe to become 1 one light year? [closed]
Given the density, pressure and other cosmological parameters. At this point we're not even thinking of time... But would this have occurred during or post Inflation?
Could this be the Expansion ...
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14
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2
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4k
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Is the Universe Past-Eternal?
Does the Borde-Guth-Vilenkin theorem definitively demonstrate that the Universe cannot be past-eternal, whatsoever?
Does it not assume a classical space-time while the real world requires Quantum ...
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19
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2
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Inflation and the Meaning of Time
I'm not quite sure how to ask this so that it can be answered in layman's terms, but I have lately seen, in several places, that with cosmological inflation, there was a point where the universe ...
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12
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0
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573
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Time diffeomorphisms breaking in inflation
I am currently working on the topic of inflation.
It seems that at the stage of inflation, the universe can be described as a de Sitter space. In such a space, all spacetime diffeomorphisms are ...
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