What were the initial ingredients of the BB

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Discussion Overview

The discussion revolves around the initial conditions and ingredients of the universe at or before the Planck time (10^-43 seconds) in the context of the Big Bang theory. Participants explore theoretical concepts related to the nature of energy, elementary particles, and the implications of inflation.

Discussion Character

  • Exploratory, Debate/contested, Conceptual clarification

Main Points Raised

  • One participant questions what forms of matter existed at or before the Planck time, suggesting possibilities like free quarks, leptons, and bosons.
  • Another participant states that inflation did not create spacetime but rather caused rapid expansion of the universe.
  • There is a suggestion that energy existed in the form of very high energy electromagnetic radiation and kinetic energy of elementary particles.
  • Some participants speculate that the universe may have been pure energy before Planck time, with mass-possessing particles emerging later during the inflationary epoch.
  • One participant proposes that the pre-Planck time universe could resemble an Einstein-Bose condensate in reverse, suggesting a single high energy string that fragmented during inflation.
  • Another participant raises the idea of the Big Bang being analogous to nuclear decay, where a singular entity transforms into many smaller entities.

Areas of Agreement / Disagreement

Participants express differing views on the nature of the universe before Planck time, with no consensus on the specific forms of energy or matter that may have existed. The discussion remains unresolved regarding the initial conditions of the universe.

Contextual Notes

Participants acknowledge the speculative nature of their claims, particularly regarding the lack of empirical evidence for conditions before Planck time and the definitions of terms like "pure energy."

Tanelorn
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I have read the time line several times for the BB:

http://en.wikipedia.org/wiki/Timeline_of_the_Big_Bang

And I am unclear what were the initial ingredients at or before the 10-43 seconds. All I can get from this is high temperature which means high energy or high vibrational energy in matter.
Were there any forms of matter at this stage? e.g. free quarks, leptons and bosons?

So all I can see for the initial ingredients are:

1. Inflation which seems to greatly increase the size of the Universe. Is it correct to say it created spacetime?

2. Energy. I am not sure what this form of energy is eg. vibrational or radiation?

3. Elementary particles? http://en.wikipedia.org/wiki/Elementary_particle
 
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To quote wiki:

The earliest instant of the Big Bang expansion is still an area of open investigation. The Big Bang theory does not provide any explanation for the initial conditions of the universe; rather, it describes and explains the general evolution of the universe going forward from that point on.

As for your specific points:

1. No, inflation just made the universe expand very very very rapidly. It did not create spacetime.

2. Energy probably existed in the form of VERY high energy EM radiation and VERY high kinetic energy of elementary particles.

3. If we assume that SOMETHING existed at that point in time, then I'd guess that it would be elementary particles. But given the extreme energy they may be particles that we've never seen before or they may behave in very different ways than we observe today.
 
We have nothing but guesses about what the universe was like before Planck time. It may have been pure energy with mass possessing particles emerging later - possibly condensing during the inflationary epoch.
 
Chronos said:
We have nothing but guesses about what the universe was like before Planck time. It may have been pure energy with mass possessing particles emerging later - possibly condensing during the inflationary epoch.

And what is "pure energy"?
 
Yes that is the essence of my question, what is the speculated form of this energy before 10-43 secs? Perhaps High kinetic energy of elementary particles and radiation or is that later on?
 
Last edited:
The only suspect is the inflaton at this point.
 
Perhaps what constituted a pre-planck time universe is similar to an einstein-Bose condensate (in reverse) and was composed of one single high energy string that "broke" up with the expansion/inflation to create the first photons and quarks?
It will be interesting to see in the future how such high energy and pressure affect matter.
 
gp, An interesting idea. I have also wondered if the BB being could be as a result of something similar to nuclear decay. ie something that was one thing becoming many much smaller things.
 

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