Feynman's path integral formulation

Feynman's path integral formulation describes quantum particles not as following a single, definite path but as exploring all possible routes between two points. Instead of thinking of a particle moving along one trajectory, it considers every conceivable path the particle could take, with each path contributing a complex number called a probability amplitude. When these amplitudes are summed over all paths, they determine the likelihood of finding the particle at a particular location. This approach provides a comprehensive way to calculate quantum behavior, emphasizing the wave-like nature of particles and the importance of interference among all possible paths.