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Pre-Big Bang

 
 
Reply Thu 20 Feb, 2020 08:15 pm
In the so-called pre-bang scenario, the universe began in a vastly different state than it does in the Big Bang framework. Rather than being enormously hot and tightly curled into a tiny spatial speck, the universe started out as cold and essentially infinite in spatial extent. The equations of string theory then indicate that an instability kicked in, driving every point in the universe to rush rapidly from every other. This caused space to become increasingly curved and results in a dramatic increase in temperature and energy density. After some time, a millimeter sized three dimensional region within this vast expanse could look just like the super hot and dense patch emerging from inflationary expansion. Then through the standard expansion of big bang cosmolgy this patch can account for the whole of the universe with which we are familiar.
 
BillRM
 
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Reply Fri 21 Feb, 2020 01:45 pm
@Vette888,
Suggest anyone interest in the subject pick up the below book


Quote:
A Universe from Nothing by Krauss

Lawrence M. Krauss is Foundation Professor in the School of Earth and Space Exploration and the Physics Department at Arizona State University, as well as Co-Director of the Cosmology Initiative and Inaugural Director of the Origins Project. The Origins program involves new and wide-ranging interdisciplinary research, teaching, and outreach focusing on all aspects of origins: from the origins of the cosmos to human origins, to the origins of consciousness and culture. Krauss is an internationally known theoretical physicist with broad research interests, including the interface between elementary particle physics and cosmology. He received his PhD in physics from the Massachusetts Institute of Technology in 1982, and joined the Harvard Society of Fellows. In 1985, he joined the faculty of physics at Yale University, and then moved to Case Western Reserve University as Ambrose Swasey Professor in 1993. From 1993 to 2005, he served as chairman of the physics department at Case. He is the recipient of numerous international awards for his research and writing, and is the only physicist to receive awards from all three major US physics societies, the American Physical Society, the American Association of Physics Teachers, and the American Institute of Physics.
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nacredambition
 
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Reply Fri 21 Feb, 2020 07:26 pm
@Vette888,
Thank you for the topic.

I kinda like the idea.

A pre-bang theory is by definition untestable but at least it satisfies Occam's Razor.

No need to avoid attribution in your posts, it enhances them.

The paraphrasing comes from The Elegant Universe by Brian Greene.
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BillRM
 
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Reply Tue 25 Feb, 2020 08:38 am
@Vette888,
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