Instituto de Ciencia de Materiales de Madrid
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Oscillatory decay of a two-component Bose-Einstein condensate

Sigmund Kohler and Fernando Sols
Phys. Rev. Lett. 89, 060403 (2002)
We study the decay of a two-component Bose-Einstein condensate with negative effective interaction energy. With a decreasing atom number due to losses, the atom-atom interaction becomes less important and the system undergoes a transition from a bistable Josephson regime to the monostable Rabi regime, displaying oscillations in phase and number. We study the equations of motion and derive an analytical expression for the oscillation amplitude. A quantum trajectory simulation reveals that the classical description fails for low loss rates, as expected from analytical considerations. Observation of the proposed effect will provide evidence for negative effective interaction.
arXiv:cond-mat/0107568

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last modified: 15.3.2024 by Sigmund Kohler