COBAYA+CAMB marginalizing over DE models

Use of Cobaya. camb, CLASS, cosmomc, compilers, etc.
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Simone Paradiso
Posts: 3
Joined: February 03 2022
Affiliation: University of Waterloo - Waterloo Centre for Astrophysics

COBAYA+CAMB marginalizing over DE models

Post by Simone Paradiso »

Hi all,

I am trying to figure out whether there is any chance in Cobaya+CAMB to do the following:

I would like to include a discrete parameter, le's say [math]={0,1}, to switch between the dark energy model in CAMB between standard LCDM and EarlyQuintessence; the idea would be to sample over it at runtime. I am not sure there is a trivial way to do so, since the dark energy model is fixed by CAMB extra_args in the input yaml file; ideally, it should be dropped and this choice should be make dependent on the extra parameter [math]- defined in the param block of the same .yaml - in the theory code.

Does anybody of you know whether this is doable in some relatively easy way in Cobaya/CAMB, or have any suggestion?

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