Quantum Realm Embraces Classic Principle of Least Action.

Researchers have proven that the principle of least action, a fundamental law of physics, applies in the quantum realm. The principle of least action dictates that objects will always move along the route that requires the least amount of action. The research team from South China Normal University used a combination of a wave function and a propagator to describe the behavior of quantum particles. They sent individual photons through a maze and compared their behavior to the behavior predicted by the principle of least action and found that reality agreed with theory, proving that quantum particles do in fact follow the principle.