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Science Forum Index » Physics - Research Forum » Inflationary Cosmology question
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| Guest |
 Posted: Tue Nov 21, 2006 10:36 am |
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21-NOV-2006
In Guth's original paper on inflation, the mechanism for the
exponential expansion in the early universe was given as a supposition
that supercooling continued until the temperature was many orders of
magnitude lower than T_cr.
What is the status of this mechanism in the context of the various
inflationary models today, e.g. the false vacuum and slow-roll eternal
scenarios?
Is there a reasonable understanding of how (and possibly why) such
extreme supercooling would have taken place in the early universe?
grateful for any guidance on this;
mark jonathan horn |
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| Spud |
| Posted: Fri Nov 24, 2006 3:13 am |
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| Spud |
| Posted: Fri Nov 24, 2006 3:13 am |
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| Spud |
| Posted: Fri Nov 24, 2006 9:04 am |
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Guest
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mark_horn@sbcglobal.net wrote:
Quote: 21-NOV-2006
In Guth's original paper on inflation,
No solution to this problem has been found, read about the
interconnections between particle physics and gravitation.
A. D. Linde, Particle Physics and Inflationary Cosmology (Harwood,
Philadelphia, 1990).
E. W. Kolb, M. S. Turner, The Early Universe (Addison-Wesley, Reading,
MA, 1990).
A. R. Liddle, D. H. Lyth, Cosmological Inflation and Large-Scale
Structure (Cambridge Univ. Press, New York, 2000).
For a more casual approach read
A. H. Guth, The Inflationary Universe: The Quest for a New Theory of
Cosmic Origins (Addison-Wesley, Reading, MA, 1997).
Also; consider inflation may not have happened in a fraction of a
second, it could have started with the "birth" of this universe and
still be continuing .
Spud |
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| Guest |
| Posted: Sat Nov 25, 2006 1:17 pm |
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Spud wrote:
Quote: mark_horn@sbcglobal.net wrote:
21-NOV-2006
In Guth's original paper on inflation...
Is there a reasonable understanding of how (and possibly why) such
extreme supercooling would have taken place in the early universe?
No solution to this problem has been found, read about the
interconnections between particle physics and gravitation.
A. D. Linde, Particle Physics and Inflationary Cosmology (Harwood,
Philadelphia, 1990).
E. W. Kolb, M. S. Turner, The Early Universe (Addison-Wesley, Reading,
MA, 1990).
A. R. Liddle, D. H. Lyth, Cosmological Inflation and Large-Scale
Structure (Cambridge Univ. Press, New York, 2000).
For a more casual approach read
A. H. Guth, The Inflationary Universe: The Quest for a New Theory of
Cosmic Origins (Addison-Wesley, Reading, MA, 1997).
Also; consider inflation may not have happened in a fraction of a
second, it could have started with the "birth" of this universe and
still be continuing .
Spud
Excellent references, thankyou...
I suppose I'm groping after an idea of a precursor to the supercooling,
which addresses the question of whether or not inflationary spacetimes
are past-complete; e.g., Borde, Guth and Vilenkin suggest that they are
not (gr-qc/0110012)... They write:
"...we have shown under reasonable assumptions that almost all causal
geodesics, when extended to the past of an arbitrary point, reach the
boundary of the inflating region of spacetime in a finite proper
time... What can lie beyond this boundary?"
In naively trying to answer the question, I have managed to confuse
myself out of "the ultimate free lunch," only to be left with "nothing
from something."
Is the vacuum past-complete?
I'll press on; thanks again for your help,
mark jonathan horn |
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