What is the Born rule in quantum mechanics?
The Born rule, a cornerstone of quantum mechanics, provides a bridge between the abstract mathematical description of a quantum system and observable reality. It postulates that the square of the magnitude of the wave function, psi(x, t), at a specific position x and time t, represents the probability density of finding the particle at that location. This probabilistic interpretation was a departure from the deterministic classical physics and remains fundamental to our understanding of subatomic phenomena.