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Modulational Instability of Trapped Two-Component Bose–Einstein Condensates*
- Source :
- Chinese Physics Letters. 36:090302
- Publication Year :
- 2019
- Publisher :
- IOP Publishing, 2019.
-
Abstract
- The modulational instability of two-component Bose–Einstein condensates (BECs) under an external parabolic potential is discussed. Based on the trapped two-component Gross–Pitaevskill equations, a time-dependent dispersion relation is obtained analytically by means of the modified lens-type transformation and linear stability analysis. It is shown that a modulational unstable time scale exists for trapped two-component BECs. The modulational properties—which are determined by the wave number, external trapping parameter, intra- and inter-species atomic interactions—are modified significantly. The analytical results are confirmed by direct numerical simulation. Our results provide a criterion for judging the occurrence of instability of the trapped two-component BECs in experiment.
Details
- ISSN :
- 17413540 and 0256307X
- Volume :
- 36
- Database :
- OpenAIRE
- Journal :
- Chinese Physics Letters
- Accession number :
- edsair.doi...........ed018da1de6ffecd47c385aaf5ccbc2d