Atom resonant tunnelling through a moving barrier

Details Atom resonant tunnelling through a moving barrier Atom resonant tunnelling through a moving barrier

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003njph....5...78c&link_type=abstract

New Journal of Physics, Volume 5, Issue 1, pp. 78 (2003).

Physics

6

Scientific paper

We study the one-dimensional dynamical behaviour of an atomic wavepacket moving across an opaque and spatially oscillating optical barrier. The tunnelling probability shows a dramatic dependence on the frequency of the barrier oscillation. Transmission of the atomic wavepacket is, in fact, dominated by inelastic or elastic effects, depending on whether the oscillation period is comparable to or shorter than the atom barrier interaction time. In the elastic regime, in particular, we find that full transparency becomes possible at energies where the stationary barrier would otherwise be essentially opaque. We predict that both inelastic and elastic resonant tunnelling regimes could be observed with atomic condensates impinging on a spatially oscillating optical barrier. A few applications will also be discussed.

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