Introducing dark energy with evolving energy density to the code

Use of Cobaya. camb, CLASS, cosmomc, compilers, etc.
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Cihad Kıbrıs
Posts: 2
Joined: October 13 2022
Affiliation: İstanbul Technical University

Introducing dark energy with evolving energy density to the code

Post by Cihad Kıbrıs »

I want to modify the CLASS/CAMB so that it accommodates a new form of dark energy with varying energy density, that is [math] where [math] encodes the time evolution of the dark energy density. What should I exactly modify in the code to incorporate this kind of source?
Antony Lewis
Posts: 1959
Joined: September 23 2004
Affiliation: University of Sussex
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Re: Introducing dark energy with evolving energy density to the code

Post by Antony Lewis »

If you can calculate w(a), you can use as in box 13 of the example notebook
https://camb.readthedocs.io/en/latest/CAMBdemo.html
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