I Did Universal Physical Constants Exist at the Big Bang?

AI Thread Summary
The discussion centers on whether universal physical constants, such as Planck's constant and the speed of light, were established at the moment of the Big Bang or if they emerged later. Participants explore the implications of these constants being absent in the early universe, questioning the nature of strong and weak nuclear forces during that time. The possibility of multiple variations of the universe is also raised, suggesting that different observers might perceive these variations differently. The uncertainty surrounding the existence of these constants at the Big Bang remains a key point of contention. Overall, the conversation highlights the complexities and unknowns regarding the fundamental nature of the universe's origins.
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Re: the Big Bang. Were the universal physical constants already in place at the instant of the BB? Things like Planck's constant, the speed of light, the various mass of particles, the various force values.
Were the universal physical constants already in place at the instant of the BB? Things like Planck's constant, the speed of light, the various mass of particles, the various force values. Was it possible that the early universe ( the first couple of billionths of a second or so) existed without all the values we know today? Strong and weak nuclear forces? Or did they spring into existence as the same time as the forces and particles that are associated with?
 
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It has been suggested that there could be many variations of 'the Universe',
some of which make more sense, and/or are more interesting than others.
To some extent depending on who is observing it.
Personally I am not convinced,
 

Thread 'Matter density right after the decoupling'

https://en.wikipedia.org/wiki/Recombination_(cosmology) Was a matter density right after the decoupling low enough to consider the vacuum as the actual vacuum, and not the medium through which the light propagates with the speed lower than ##({\epsilon_0\mu_0})^{-1/2}##? I'm asking this in context of the calculation of the observable universe radius, where the time integral of the inverse of the scale factor is multiplied by the constant speed of light ##c##.
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Thread 'Hubble Constant, Dark Energy and the Expanding Universe'

Why was the Hubble constant assumed to be decreasing and slowing down (decelerating) the expansion rate of the Universe, while at the same time Dark Energy is presumably accelerating the expansion? And to thicken the plot. recent news from NASA indicates that the Hubble constant is now increasing. Can you clarify this enigma? Also., if the Hubble constant eventually decreases, why is there a lower limit to its value?
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