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Adding randomness with fake data for power spectra to make decrease cosmic variance

Posted: June 20 2023
by Fabien Dournac
Hello,

The issue of the cosmic variance is due to the fact that we have only one realization of universe.

Is it possible to introduce, into CAMB or CLASS, some randomness in the generation of matter/angular power spectra in order to reduce this cosmic variance ?

I think especially about the computation of quantities as [math] and [math] or [math] to produce power spectra.

This way, we could have different realizations of universe since we would have multiples different fake data.

What do you think about this ?

Regards

Re: Adding randomness with fake data for power spectra to make decrease cosmic variance

Posted: July 03 2023
by Fabien Dournac
ok, Astropy library did it !