Roton-maxon spectrum and stability of trapped dipolar Bose-Einstein condensates
We find that pancake dipolar condensates can exhibit a roton-maxon character of the excitation spectrum, so far observed only in superfluid helium. We also obtain a condition for the dynamical stability of these condensates. The spectrum and the border of instability are tunable by varying the parti...
Gespeichert in:
| Veröffentlicht in: | Physical review letters 2003-06, Vol.90 (25 Pt 1), p.250403-250403, Article 250403 |
|---|---|
| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Zusammenfassung: | We find that pancake dipolar condensates can exhibit a roton-maxon character of the excitation spectrum, so far observed only in superfluid helium. We also obtain a condition for the dynamical stability of these condensates. The spectrum and the border of instability are tunable by varying the particle density and/or the confining potential. This opens wide possibilities for manipulating the superfluid properties of dipolar condensates. |
|---|---|
| ISSN: | 0031-9007 1079-7114 |
| DOI: | 10.1103/physrevlett.90.250403 |