This repository contains source code for the video https://www.youtube.com/watch?v=h3nMiuMPgT8

The video is about the calculation of the two-point function in one of the simplest cases in quantum field theory: The propagator of a free, real, massive scalar field at purely spatial separations. The video shows the behavior of the integrand and the integral in this calculation and the deformation of the contour applied to define this integral mathematically.

The video is the result of a small project I did in order to become familiar with this kind of oscillatory integrals. I share it in the hope that it might be interesting for someone else.

If you have any corrections or questions, please contact me (edwin.steiner@gmx.net).

See the file LICENSE for license information.