Quantum Tunnelling

What is Quantum Tunnelling?

Quantum tunnelling is a quantum mechanical topic in which subatomic particles probability disappears from one side of potential barriers and appears on other side without any probability current flow inside the barrier. In this effect particles have a finite probability of crossing an energy barrier. Tunneling occur in quantum mechanics when electron pass through the barrier which they possibly cannot pass. Its occur because of significant solution of Schrodinger Equation.

Applications of Quantum Tunnelling

Quantum tunnelling has its uses in Physics. Its uses are in nuclear fission, quantum computing, tunnel diode and scanning tunnelling microscope. Radioactive decay and the behavior of semiconductors and superconductors are also related applications of Quantum Tunnelling.

How Quantum Tunnelling happens?

Lets get the example of throwing ball. Suppose you throw a ball above a wall. What will happen ? There are two possibilities if ball have enough energy to pass the hill it will go other side or come back down. But in quantum physics things are different.Even if the particles not have energy to pass the barriers it will appear other side. If the particles confront the energy barrier this changes the wave function, which start the decay inside the barrier. This helps to pass the particles.

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