Dynamical instability of the XY spiral state of ferromagnetic condensates

被引：32

作者：

Cherng, R. W. ^{[1
]}

Gritsev, V. ^{[1
]}

Stamper-Kurn, D. M. ^{[2
,3
]}

Demler, E. ^{[1
]}

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 18期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.100.180404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We calculate the spectrum of collective excitations of the XY spiral state prepared adiabatically or suddenly from a uniform ferromagnetic F=1 condensate. For spiral wave vectors past a critical value, spin wave excitation energies become imaginary indicating a dynamical instability. We construct phase diagrams as functions of spiral wave vector and quadratic Zeeman energy.

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页数：4

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