| GENERAL |
|
|
|
|
Modulational Instability of Dipolar Bose–Einstein Condensates in Optical Lattices with Three-Body Interactions |
| Wei Qi1**, Zi-Hao Li1, Zhao-Xin Liang2 |
1Department of Applied Physics, School of Arts and Sciences, Shaanxi University of Science and Technology, Xi'an 710021
2Department of Physics, Zhejiang Normal University, Jinhua 321004
|
|
| Cite this article: |
|
Wei Qi, Zi-Hao Li, Zhao-Xin Liang 2018 Chin. Phys. Lett. 35 010301 |
|
|
|
|
Abstract Motivated by the recent experiment [Nature 530 (2016) 194] in which a stable droplet in a dipolar quantum gas has been created by the interaction-induced instability, we focus on the modulation instability of an optically-trapped dipolar Bose–Einstein condensate with three-body interaction. Within the mean-field level, we analytically solve the discrete cubic-quintic Gross–Pitaevskii equation with dipole–dipole interaction loaded into a deep optical lattice and show how combined effects of the three-body interaction and dipole–dipole interaction on the condition of modulational instability. Our results show that the interplay of the three-body interaction and dipole–dipole interaction can dramatically change the modulation instability condition compared with the ordinary Gross–Pitaevskii equation. We believe that the predicted results in this work can be useful for the future possible experiment of loading a Bose–Einstein condensate of $^{164}$Dy atoms with strong magnetic dipole–dipole interaction into an optical lattice.
|
|
|
Received: 11 September 2017
Published: 17 December 2017
|
|
| PACS: |
03.75.Kk
|
(Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)
|
| |
03.75.Mn
|
(Multicomponent condensates; spinor condensates)
|
| |
03.65.Ge
|
(Solutions of wave equations: bound states)
|
|
|
| Fund: Supported by the National Natural Science Foundation of China under Grant No 11647017, and the Science Research Fund of Shaanxi University of Science and Technology under Grant No BJ16-03. |
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
