I am trying to compute evolve the initial power spectrum at the end of inflation to the CMB in closed model with S^3 topology. The initial power spectrum is as a function of spherical wavenumbers (n) which is discrete, but the CAMB code requires giving input in (k) which is a continuous variable. Is there a way to implement that?
Or, can I just convert 'n' to 'k' and use interpolation to find the missing k's? But, this would introduce some numerical errors because Cl's are now obtained from a discrete sum rather than an integral in k.
Any insight will be very helpful.
Thanks,
Brajesh
Using CAMB for closed FLRW model with power spectrum in spherical wave numbers

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 Joined: January 04 2015
 Affiliation: Pennsylvania State University

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Re: Using CAMB for closed FLRW model with power spectrum in
I think CAMB will only call the initial power spectrum function in closed models with values of k that correspond to integer n.

 Posts: 6
 Joined: January 04 2015
 Affiliation: Pennsylvania State University
Using CAMB for closed FLRW model with power spectrum in sphe
Thank you, Antony! I will try that.
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