Source: cirosantilli/quantization-of-a-real-scalar-field
= Quantization of a real scalar field
This is one of the first examples in most <quantum field theory>.
It usually does not involve any forces, just the interpretation of what the <quantum field> is.
https://www.youtube.com/watch?v=zv94slY6WqY&list=PLSpklniGdSfSsk7BSZjONcfhRGKNa2uou&index=2 Quantization Of A Free Real Scalar Field by Dietterich Labs (2019)