Quantum Tunneling is a quantum phenomenon where particles with less energy than that of a potential barrier can still cross the energy barrier, by “tunneling” through. This means that the particle, which according to classical mechanics, cannot possibly end up on the other side of the barrier, has a chance of being found within or on the other side of the barrier – corresponding to a finite probability of being found in these “classically forbidden regions”. This will be explained in a more simplistic manner later on.
In this article, I will aim to explain how some concepts in quantum mechanics means that tunneling is possible. This will involve having a look at various examples of tunneling phenomena, what wave functions are and also the time-independent Schrodinger Equation.