What is the method for finding the power spectrum from the distribution of density? Considering I have the distribution of density over a certain volume.
I would refer you to the book "Statistical Physics for Cosmic Structures" (Springer,2005)
https://www.researchgate.net/publication/221936046_Non-linear_power_spectra_of_dark_and_luminous_matter_in_halo_model_of_structure_formation?ev=prf_pub
Article Non-linear power spectra of dark and luminous matter in halo...
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