I have a question regarding the exact formulation of the mechanism of Inflation.
In thehttp://www.damtp.cam.ac.uk/user/db275/Cosmology/Lectures.pdf he uses ##\frac{d}{dt} \frac{1}{aH} < 0## as an definition of inflation. I see that it yields ## \ddot a > 0##, but my confusion lies in the...
I think he means that GR is a continuum field theory and that R^n is an uncountable set? by "being digital" i think he actually means 'discrete' (to overcome the uncountability). Anyway, QST, that's not always problematic (n-volume integrals over R^n can still be finite), but can be (like UV...
Hey,
thank you for your answer! That clears up a lot.
I see, so the quantum fluctuations are still reentering the horizon today since some of the modes that were created during inflation are so large that they just did not enter until recently?
What is meant by oscillating in terms of physics...
Hey there,
i have a question regarding basic inflation and structure formation via linear first order perturbation theory in cosmology.
I read through different material (Baumann lecture notes, wikipedia articles, Mukhanov, ...), but at this point i am just confused and find it hard to get an...