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Modify CAMB+cobaya to introduce a parametrization of linear growth rate f(z)

Posted: April 22 2022
by Minh Nguyen
Dear Antony,

I have a question that is similar to one that was asked on this forum a while back. Unfortunately, I could not find a satisfying answer in that old topic. Hence my new topic.

I wonder, is it, in general, feasible and a fine idea, to try to modify CAMB (and cobaya) to allow for a parametrization of the growh rate f(z), e.g.
after a certain redshift, assuming no massive neutrino?

Even if it's not possible or might be a bad idea, I would really like to learn of why.

Many thanks,