Time-dependent tunneling of Bose-Einstein condensates

Details Time-dependent tunneling of Bose-Einstein condensates Time-dependent tunneling of Bose-Einstein condensates

1999-08-12

arxiv.org/abs/cond-mat/9908174v1

Physics

Condensed Matter

8 pages, 5 figures

Scientific paper

10.1103/PhysRevA.61.033603

The influence of atomic interactions on time-dependent tunneling processes of Bose-Einstein condensates is investigated. In a variety of contexts the relevant condensate dynamics can be described by a Landau-Zener equation modified by the appearance of nonlinear contributions. Based on this equation it is discussed how the interactions modify the tunneling probability. In particular, it is shown that for certain parameter values, due to a nonlinear hysteresis effect, complete adiabatic population transfer is impossible however slowly the resonance is crossed. The results also indicate that the interactions can cause significant increase as well as decrease of tunneling probabilities which should be observable in currently feasible experiments.

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