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arXiv · 1707.02106

Long-time expansion of a Bose-Einstein condensate: Can Anderson localization be observed?

Stefan Donsa·Harald Hofstätter·Othmar Koch·Joachim Burgdörfer·Iva Brezinova
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Abstract

We numerically explore the long-time expansion of a one-dimensional Bose-Einstein condensate in a disorder potential employing the Gross-Pitaevskii equation. The goal is to search for unique signatures of Anderson localization in the presence of particle-particle interactions. Using typical experimental parameters we show that the time scale for which the non-equilibrium dynamics of the interacting system begins to diverge from the non-interacting system exceeds the observation times up to now accessible in the experiment. We find evidence that the long-time evolution of the wavepacket is characterized by (sub)diffusive spreading and a growing effective localization length suggesting that interactions destroy Anderson localization.

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Stefan Donsa, Harald Hofstätter, Othmar Koch, Joachim Burgdörfer, Iva Brezinova. 2017-07-07. Long-time expansion of a Bose-Einstein condensate: Can Anderson localization be observed?. https://doi.org/10.1103/physreva.96.043630

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