The phenomenon of barrier penetration, such as tunnelling through a potential barrier, is an outstanding example of quantum behavior. Quantum particles can be found in regions where a classical particle coidd never go. since it would have negative kinetic energy. But in quantum theory, too, the eigenvalues of kinetic energy cannot be negative. How, then, can a quantum particle" tunnel"? The apparent paradox is resolved by noting that the wave function of a tunnelling particle only partly overlaps the forbidden region.
|Original language||English GB|
|Title of host publication||Proc. 4th Int. Symp. Foundations of Quantum Mechanics, Tokyo|
|State||Published - 1992|