Mixed quantum-classical dynamics is a way of combining the power of quantum physics and classical physics to better understand and predict how nature works.
Quantum physics is the study of very small particles, like atoms and electrons, and their behavior. Classical physics is the study of bigger things, like planets and cars, and their behavior. Both are necessary for understanding the universe.
Mixed quantum-classical dynamics combines these two powerful sciences in order to better understand natural phenomena. Scientists use mixed quantum-classical dynamics to try to simulate and predict the behavior of complex molecules and atoms where it isn’t possible to solve the quantum physics equations exactly. This technique helps us better understand things like gas and chemical reactions on a very small scale.
For example, scientists use mixed quantum-classical dynamics to look at the behavior of a gas inside a container, like the one you might use to store food. The walls of the container and the molecules inside the container can all be studied using the tools of quantum physics. But because there are too many molecules for scientists to solve for the exact behavior of each one, they use mixed quantum-classical dynamics to approximate the behavior of the whole system.
By combining the power of quantum and classical physics, scientists can more accurately study, simulate, and predict the behavior of very small things like atoms and molecules.