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Phys Rev Lett. 2011 Jun 17;106(24):240401. Epub 2011 Jun 14.

Swift loss of coherence of soliton trains in attractive Bose-Einstein condensates.

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Theoretische Chemie, Physikalisch-Chemisches Institut, Universit├Ąt Heidelberg, Heidelberg, Germany.


Experiments on ultracold attractive Bose-Einstein condensates (BECs) have demonstrated that at low dimensions atomic clouds can form localized objects, propagating for long times without significant changes in their shapes and attributed to bright matter-wave solitons, which are coherent objects. We consider the dynamics of bright soliton trains from the perspective of many-boson physics. The fate of matter-wave soliton trains is actually to quickly lose their coherence and become macroscopically fragmented BECs. The death of the coherent matter-wave soliton trains gives birth to fragmented objects, whose quantum properties and experimental signatures differ substantially from what is currently assumed.

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