FAST-PT is a code to calculate quantities in cosmological perturbation theory at 1-loop (including, e.g., corrections to the matter power spectrum). The code utilizes Fourier methods combined with analytic expressions to reduce the computation time to scale as N log N, where N is the number of grid points in the input linear power spectrum.
FAST-PT way to get started:
- Make sure you have current numpy, scipy, and matplotlib
- download FAST-PT (or clone the repo)
- in terminal type the following:
- python FASTPT.py
- (hopefully you get a plot)
See the user_manual.pdf for more details.
Our papers (JCAP 2016, 9, 15; arXiv:1603.04826) and (JCAP 2017, 2, 30; arXiv:1609.05978) describe the FAST-PT algorithm and implementation. Please cite these papers when using FAST-PT in your research. For the intrinsic alignment implementation, cite arXiv:1708.09247.
FAST-PT is under continued development and should be considered research in progress. FAST-PT is open source and distributed with the MIT license. If you have comments, questions, or feedback, please file an issue.