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Quantum tunneling allows particles to penetrate barriers that would be insurmountable in classical physics from "summary" of Simply Quantum Physics by DK
Quantum tunneling is a remarkable phenomenon that defies the laws of classical physics. It allows particles to pass through barriers that would be impossible to overcome in the classical world. Imagine a particle approaching a barrier that it doesn't have enough energy to surmount. In classical physics, the particle would simply bounce off the barrier and be unable to pass through. However, in the quantum realm, the particle can tunnel through the barrier as if it didn't even exist. This seemingly magical ability is made possible by the wave-like nature of particles in quantum mechanics. According to the laws of quantum physics, particles such as electrons can exhibit wave-like behavior, which allows them to spread out and exist in multiple places at once. As a result, there is a small probability that the particle can be found on the other side of the barrier, even though it ...
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