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In
quantum
mechanics, quantum
tunnelling (or the tunnel effect) is a nanoscopic phenomenon in which a
particle violates the principles of classical mechanics by penetrating a
potential barrier or impedance
higher than the kinetic energy
of the particle.[1] A barrier, in terms of quantum
tunnelling, may be a form of energy
state analogous to a "hill" or incline in classical mechanics, which classically
suggests that passage through or over such a barrier would be impossible
without sufficient energy.
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