Onset of a modulational instability in trapped dipolar Bose-Einstein condensates

被引:42
|
作者
Ferrier-Barbut, Igor [1 ]
Wenzel, Matthias
Schmitt, Matthias
Bottcher, Fabian
Pfau, Tilman
机构
[1] Univ Stuttgart, Phys Inst 5, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
关键词
QUANTUM; DROPLETS;
D O I
10.1103/PhysRevA.97.011604
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We explore the phase diagram of a finite-sized dysprosium dipolar Bose-Einstein condensate in a cylindrical harmonic trap. We monitor the final state after the scattering length is lowered from the repulsive BEC regime to the quantum droplet regime. Either an adiabatic transformation between a BEC and a quantum droplet is obtained or, above a critical trap aspect ratio lambda(c) = 1.87( 14), a modulational instability results in the formation of multiple droplets. This is in full agreement with the predicted structure of the phase diagram with a crossover region below lambda(c) and a multistable region above. Our results provide the missing piece connecting the previously explored regimes resulting in a single or multiple dipolar quantum droplets.
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页数:5
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