= Second quantization
{wiki}
https://www.quora.com/How-are-quantum-fields-quantized-to-describe-particles
Second quantization also appears to be useful not only for <relativistic quantum mechanics>, but also for <condensed matter physics>. The reason is that the basis idea is to use the number occupation basis. This basis is:
* convenient for <quantum field theory> because of <particle creation and annihilation> changes the number of particles all the time
* convenient for <condensed matter physics> because there you have a gazillion particles occupying entire <electronic band theory>[energy bands]
Bibliography:
* https://www.youtube.com/watch?v=MVqOfEYzwFY "How to Visualize Quantum Field Theory" by ZAP Physics (2020). Has <quantum field theory simulations>[1D simulations] on a circle. Starts towards the right direction, but is a bit lacking unfortunately, could go deeper.