Homogeneous/Inhomogeneous particle production

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I'm currently self studying cosmology, and I've gathered a smattering of articles describing various particle production sources. These sources include production through Homogeneous/inhomogeneous regions. Unruh effect (cosmological Horizon-De Sitter), Hawking radiation. Parker particle production. The list goes on.

One thing I've been noticing is that all these various production regions are all describing regions of varying entropy/energy density regions.

Has anyone come across research or papers that have reconciled the various productions into a more generic formalization?

edit: here are some of the papers
 

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Browse on the web. I do not know.
 
I always browse the web first :smile:, The main similarities lies in the perturbations. These different situations are areas of high perturbations. I'd ask in QM forum but my understanding of QM mathematics is far worse.

edit: I just answered my own question :smile:. Follow the history of perturbation theory.
 
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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 'Rutgers finds a transparent Einstein Cross - apparently a dark matter "halo".'

The formal paper is here. The Rutgers University news has published a story about an image being closely examined at their New Brunswick campus. Here is an excerpt: Computer modeling of the gravitational lens by Keeton and Eid showed that the four visible foreground galaxies causing the gravitational bending couldn’t explain the details of the five-image pattern. Only with the addition of a large, invisible mass, in this case, a dark matter halo, could the model match the observations...
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Thread 'Big Bang and Infinite Universe'

Hi, I’m pretty new to cosmology and I’m trying to get my head around the Big Bang and the potential infinite extent of the universe as a whole. There’s lots of misleading info out there but this forum and a few others have helped me and I just wanted to check I have the right idea. The Big Bang was the creation of space and time. At this instant t=0 space was infinite in size but the scale factor was zero. I’m picturing it (hopefully correctly) like an excel spreadsheet with infinite...
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