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arXiv · 1409.0323

Breaking the resilience of a two-dimensional Bose-Einstein condensate to fragmentation

Shachar Klaiman·Axel U. J. Lode·Alexej I. Streltsov·Lorenz S. Cederbaum·Ofir E. Alon
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Abstract

A two-dimensional Bose-Einstein condensate (BEC) split by a radial potential barrier is investigated. We determine on an accurate many-body level the system's ground-state phase diagram as well as a time-dependent phase diagram of the splitting process. Whereas the ground state is condensed for a wide range of parameters, the time-dependent splitting process leads to substantial fragmentation. We demonstrate for the first time the dynamical fragmentation of a BEC despite its ground state being condensed. The results are analyzed by a mean-field model and suggest that a large manifold of low-lying fragmented excited states can significantly impact the dynamics of trapped two-dimensional BECs.

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Shachar Klaiman, Axel U. J. Lode, Alexej I. Streltsov, Lorenz S. Cederbaum, Ofir E. Alon. 2014-09-01. Breaking the resilience of a two-dimensional Bose-Einstein condensate to fragmentation. https://doi.org/10.1103/physreva.90.043620

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