english: This is because, according to the laws of quantum mechanics, it is possible to have transitions between two states, even in the presence of an energy barrier separating the two states, and the phenomenon is called, quite appropriately, quantum tunneling.
non_english: Iz razloga što, prema zakonima kvantne mehanike, moguće je imati prelaz između dva stanja čak i u prisustvu energetske barijere koja razdvaja dva stanja, i ta pojava naziva se sasvim prikladno, kvantno tuneliranje.