That too. 3 4
How Ptolemaic.
One physicist I spoke with a few years ago supposed quantum indeterminacy would still play a factor in the heat death of the present universe, so that recombination, or a subsequent âbig bangâ is a real possibility.
Ever hear of the concept of the collapse of the metric?
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No, but reading about it now, I thought about how the immediate effect of an uncaused cause will appear to come from nothing. It seems relevant to the point at which spacetime collapses into the singularityâŚ. a non-local singularity
What is it? Bing hasnât.
âCollapse of the metricâ could describe:
- A transition from a superposition of geometries (many possible spacetime configurations) into a single classical geometry.
- This is analogous to wavefunction collapse, but applied to spacetime itself.
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The idea is that once everything in the universe has become nothing but photons the universe will be flat and there will be no such thing as distance or even time, which is indistinguishable from a big bang condition.
Whose idea is that? Apart from yours?
Thatâs the only thing they have in common, time being meaningless before the Planck epoch, and with the isolation and near infinite attenuation of all photons by the expansion of space. Which looks like it wonât happen now that dark energy has been found to be decreasing for a while.
A browser search tells me that Roger Penrose arrived at it mathematically.
I got there by staying up too late one night thinking about a universe with nothing but photons.
Source? All Iâve seen is that its status as a constant has been challenged mathematically.
Wiki, 2nd para.
Itâs all theoretical I realise.