Propagation of collective modes in non-overlapping dipolar Bose-Einstein Condensates

22nd International Laser Physics Workshop

Gallemi, A.^1 ; Guilleumas, M.^2 ; Mayol, R.^2 ; Pi, M.^2

Departament d'Estructura i Constituents de la Materia, Facultat de Fsica, Universitat de Barcelona, 08028-Barcelona, Spain^1

Institut de Nanociencia i Nanotecnologia (IN2UB), Universitat de Barcelona, 08028-Barcelona, Spain^2

关键词: Bose-Einstein condensates;    Collective modes;    Coupled pendulums;    Dipolar couplings;    Dipolar interaction;    Gross-Pitaevskii equation;    Long range effects;    Overlapping condensates;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/497/1/012035/pdf
DOI  :  10.1088/1742-6596/497/1/012035

来源: IOP

【 摘 要 】

We investigate long-range effects of the dipolar interaction in Bose-Einstein condensates by solving the time-dependent 3D Gross-Pitaevskii equation. We study the propagation of excitations between non-overlapping condensates when a collective mode is excited in one of the condensates. We obtain the frequency shifts due to the long-range character of the dipolar coupling for the bilayer and also the trilayer system when the dipolar mode is excited in one condensate. The propagation of the monopolar and quadrupolar modes are also investigated. The coupled-pendulum model is proposed to qualitatively explain the long range effects of the dipolar coupling.