Modulational Instability of Spinor Condensates in an Optical Lattice

We obtain analytically the static states and corresponding collective-excitation spectra of a quasi-onedimensional spin-1 condensate modulated by a long-wavelength optical lattice in the weak lattice limit. It is demonstrated that both ferromagnetic and antiferromagnetic condensates may exhibit dyna...

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Published inCommunications in theoretical physics Vol. 63; no. 5; pp. 565 - 568
Main Author 郑公平 简闻天 杨玲玲
Format Journal Article
LanguageEnglish
Published 01.05.2015
Subjects
Antiferromagnetism
Condensates
Ferromagnetism
Instability
Mathematical analysis
Optical lattices
Spectra
Stability
光晶格
光谱调制
凝聚体
力学不稳定性
动力不稳定
旋量
调制不稳定性
铁磁相互作用
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Summary:We obtain analytically the static states and corresponding collective-excitation spectra of a quasi-onedimensional spin-1 condensate modulated by a long-wavelength optical lattice in the weak lattice limit. It is demonstrated that both ferromagnetic and antiferromagnetic condensates may exhibit dynamical instability, which agree with the results with numerical simulation. In the homogeneous limit, our resuRs reduce to the previous results for homogeneous spinor condensates, i.e., dynamical instability can occur only for ferromagnetic interaction and an antiferromagnetic condensate is always dynamically stable.
Bibliography:long-wavelength optical lattice, modulational instability, spinor condensate
We obtain analytically the static states and corresponding collective-excitation spectra of a quasi-onedimensional spin-1 condensate modulated by a long-wavelength optical lattice in the weak lattice limit. It is demonstrated that both ferromagnetic and antiferromagnetic condensates may exhibit dynamical instability, which agree with the results with numerical simulation. In the homogeneous limit, our resuRs reduce to the previous results for homogeneous spinor condensates, i.e., dynamical instability can occur only for ferromagnetic interaction and an antiferromagnetic condensate is always dynamically stable.
11-2592/O3
ZHENG Gong-Ping,JIAN Wen-Tian, YANG Ling-Ling （ Department of Physics, Henan Normal University, Xinxiang 453007, China）
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0253-6102
1572-9494
DOI:10.1088/0253-6102/63/5/565