tunneling

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tunneling

tunneling quantum-mechanical effect by which a particle can penetrate a barrier into a region of space that would be forbidden by ordinary classical mechanics. Tunneling is a direct result of the wavelike properties of particles; the wave associated with a particle "decays" through a barrier—the amplitude decreases—but the amplitude of the wave on the other side of the barrier is large enough that there is a finite probability of finding the particle there. The theory of tunneling has been successfully applied to understand alpha decay, in which a heavy nucleus decays into a lighter nucleus and emits an alpha particle (helium nucleus).

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tunnelling

A Dictionary of the Internet | 2001 | | Â© A Dictionary of the Internet 2001, originally published by Oxford University Press 2001. (Hide copyright information) Copyright

tunnelling The process of sending data expressed in one PROTOCOL but embedding the data within another protocol. One use of tunnelling is to send transmissions expressed in one protocol over the Internet embedded in the INTERNET PROTOCOL.

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	Tunneling-vacuum interaction and time-translation of biomolecules.(News & Views) Magazine article from: Frontier Perspectives; 9/22/2008

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