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

Use of Cobaya. camb, CLASS, cosmomc, compilers, etc.
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Minh Nguyen
Posts: 6
Joined: March 21 2016
Affiliation: Leinweber Center for Theoretical Physics, University of Michigan
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Modify CAMB+cobaya to introduce a parametrization of linear growth rate f(z)

Post by Minh Nguyen » April 22 2022

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.
[math]
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,
Minh

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