classical-quantum correspondence

Classical-quantum correspondence refers to the idea that the behavior of quantum systems (the realm of atoms and particles) aligns with classical physics (the world we see daily) when conditions are large or coarse enough. Essentially, at large scales or high energies, quantum effects diminish, and systems follow classical laws like Newton’s. This link helps us understand how the strange, probabilistic quantum world transitions smoothly into the predictable classical world, ensuring theories remain consistent across different scales. It's a bridge that shows quantum mechanics underpins classical physics, especially when observing phenomena at everyday sizes.