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background
The basic idea of early-universe inflation is that our universe has undergone a very rapid expansion in the first ~10-35 seconds of the observable history of the universe (see e.g. 1807.06211, 2312.13238, 2203.08128, 1402.0526, 0705.0164 and 2307.16308). The simplest construction is to make a scalar field, dubbed the inflaton, slowly roll down its potential. When the inflaton rolls to the bottom of the potential, it starts to oscillate and transfers its energy to other fields. Kinetic preheating (see e.g. 2402.16152) is an efficient mechanism to transfer the energy of inflaton to other (speculated) field(s). Preheating is a complicated nonlinear and chaotic process. In this project we want to study whether the kinetic preheating process can be modulated by the long-wavelength modes of the field that the inflaton kineticly couples to. This is important because if the preheating process is modulated by a light field other than the inflaton, there will be observable non-Gaussian signals in the cosmic microwave background and large-scale structure of the universe (see e.g. 0903.3407 and 1902.10096).
how to contributeDownload this package. Extract it. Enter the folder and run the run_fast.py or run_slow.py file. It takes about one hour (eight hours) with a laptop to produce a result with run_fast.py (run_slow.py).
The final output looks like
xx xxx xxxxxxx xxxxx
If you want, you can run the script a few times and produces multiple lines of outputs.
Upload your results below (all fields are required, English preferred).