Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
53 (1988), S. 1982-1984
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The frequency-dependent transmission coefficient of a particle tunneling through a time-dependent barrier is calculated taking into account the quantum interference effect. We consider a rectangular barrier of height V0 with a time-dependent modulation of single frequency ω. For small modulation amplitude V1, our result is exact up to order V21 for any barrier width. In the low transmission region, our result is consistent with those obtained using a semiclassical method. We find that quantum interference (two modulation quanta process) makes a significant contribution to the tunneling current. In the static approximation, ωτ(very-much-less-than)1, where τ is the barrier transit time, the contribution to the current from interference process is to cancel one-half of the tunneling current from first-order process (one modulation quantum process). To the lowest order in power series of V1/(h-dash-bar)ω, the tunneling current is reduced due to interference.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.100339
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