Quantum Mechanics and Path Integrals

Quantum mechanics is the branch of physics that describes how very small particles, like electrons and photons, behave in ways that differ from everyday experience, such as existing in multiple states simultaneously. The path integral formulation, developed by Richard Feynman, visualizes a particle's behavior as a sum over all possible paths it could take between two points. Instead of a single trajectory, each path contributes a probability, and their combined effects determine where the particle is likely to be found. This approach provides a comprehensive way to compute quantum phenomena by considering every possible history the particle could follow.