Abstract
The problem of tunnelling through a time-dependent delta-function barrier, V(x, t) =λτ/tδ(x), has been solved analytically for t≧0. The Massey parameter α=γτk/h{combining short stroke overlay} controls the tunnel process: For α≫1, a continuum electron with momentum h{combining short stroke overlay}k will adjust its wavefunction to the variable barrier; for α≪1 the change of the barrier is too sudden to allow for adjustment. The characteristic time τ is used to clarify the concept of a tunnelling time.
Original language | English |
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Pages (from-to) | 267-271 |
Number of pages | 5 |
Journal | Zeitschrift fur Physik D-Atoms Molecules and Clusters |
Volume | 9 |
Issue number | 4 |
DOIs | |
State | Published - Dec 1988 |
Keywords
- 03.65
- 03.80
- 34.00