Author： Gong-Ping Zheng Wen-Tian Jian Ling-Ling Yang
Publisher： IOP Publishing
E-ISSN： 1572-9494|63|5|565-568
ISSN： 0253-6102
Source： Communications in Theoretical Physics, Vol.63, Iss.5, 2015-05, pp. : 565-568
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Abstract
We obtain analytically the static states and corresponding collective-excitation spectra of a quasi-one-dimensional 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 results 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.
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