👉 Propagators are mathematical objects that relate to quantum mechanics and have applications in various fields such as condensed matter physics, quantum field theory, and statistical mechanics. They are fundamental building blocks of quantum mechanics and are used to describe the interactions between particles and their wave functions. In quantum mechanics, propagators play a crucial role because they allow us to represent the time evolution of particle states. Propagators are defined by their properties such as the commutator relation, which relates them with other operators in
