Roton-maxon spectrum and stability of trapped dipolar Bose-Einstein condensates

被引：463
|
作者：
Santos, L
Shlyapnikov, GV
Lewenstein, M
机构：
[1] Leibniz Univ Hannover, Inst Theoret Phys, D-30167 Hannover, Germany
[2] FOM, Inst Atom & Mol Phys, NL-1098 SJ Amsterdam, Netherlands
[3] Russell Res Ctr Kurchatov Inst, Moscow 123182, Russia
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 25期
关键词：
MOLECULES; GASES; GATES; ATOMS;
D O I：
10.1103/PhysRevLett.90.250403
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
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页数：4
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