Textures of Spin-Orbit Coupled F=2 Bose-Einstein Condensates

Textures of Spin-Orbit Coupled F=2 Bose-Einstein Condensates
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自旋轨道耦合 F=2 玻色-爱因斯坦凝聚体的结构

DOI:
10.1088/1742-6596/400/1/012028
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发表时间:
2012
期刊:
Journal of Physics : Conference Series
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et al.
et al.
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作者:
Takuto Kawakami;et al.

文献摘要

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受最近在合成规范场下玻色爱因斯坦凝聚 (BEC) 研究的启发,我们研究了具有类似 Rashba 的自旋轨道耦合 (SOC) 的 F= 2 BEC 的结构。通过分析 SOC 项,我们证明 SOC 有利于阶次参数 (OP) 的螺旋调制。此外,我们发现通过 Gross-Pitaevskii 能量泛函的数值最小化获得的稳定纹理,并将其解释为一维或二维螺旋调制。在有利于极性OP的参数区域,详细讨论了单轴极性OP的斯格明子的出现及其相对于双轴极性OP的一维螺旋调制的能量学。通过循环有利参数区和单轴极性斯格明子晶格织构的比较,我们揭示了单轴极性斯格明子晶格的不稳定性。
Motivated by recent studies of Bose Einstein condensates (BECs) under synthetic gauge fields, we study the textures of F= 2 BECs with a Rashba like spin-orbit coupling (SOC). By analyzing the SOC term, we demonstrate that the SOC favors a helical modulation of order parameters (OPs). In addition, we find the stable textures obtained by the numerical minimization of the Gross-Pitaevskii energy functional and interpret them as a one-or two-dimensional helical modulation. In the parameter region where the polar OP is favored, the emergence of the skyrmion of the uniaxial polar OP and its energetics relative to one-dimensional helical modulation of biaxial polar OP are discussed in details. Through the comparison of the lattice texture in the cyclic favored parameter region and uniaxial polar skyrmion, we show the instability of the lattice of the uniaxial polar skyrmion.