Quantum tunneling time

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Abstract

A simple model of a quantum clock is applied to the old and controversial problem of how long a particle takes to tunnel through a quantum barrier. The model has the advantage of yielding sensible results for energy eigenstates and does not require the use of time-dependent wave packets. Although the treatment does not forbid superluminal tunneling velocities, there is no implication of faster-than-light signaling because only the transit duration is measurable, not the absolute time of transit. A comparison is given with the weak-measurement post-selection calculations of Steinberg.

Original languageEnglish (US)
Pages (from-to)23-27
Number of pages5
JournalAmerican Journal of Physics
Volume73
Issue number1
DOIs
StatePublished - Jan 1 2005
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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