The anomalous tunneling of Bose-condensate excitations

Details The anomalous tunneling of Bose-condensate excitations The anomalous tunneling of Bose-condensate excitations

2002-10-15

arxiv.org/abs/cond-mat/0210329v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

We discuss the tunneling of phonon excitations across a potential barrier separating two condensate bulks. It is shown that the strong barrier proves to be transparent for the excitations at low energy $\epsilon$. Moreover, the transmission is reduced with increasing $\epsilon$ in contrast to the standard dependence. This anomalous behavior is due to an existence of the quasiresonance interaction. The origin of this interaction is a result of the formation of the special well determined by the density distribution of condensate in the vicinity of a high barrier.

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