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 language||English (US)|
|Number of pages||5|
|Journal||American Journal of Physics|
|State||Published - Jan 2005|
ASJC Scopus subject areas
- Physics and Astronomy(all)