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arXiv 1303.4469cond-mat.quant-gascond-mat.supr-conhep-phhep-th
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场论中的D-膜孤子和boojum以及玻色-爱因斯坦凝聚体

D-brane solitons and boojums in field theory and Bose-Einstein condensates

Kenichi Kasamatsu, Hiromitsu Takeuchi, Muneto Nitta

摘要:

在某些场论模型中,由畴壁和附着在畴壁上的涡旋线组成的复合孤子被称为D膜孤子。我们证明了在相位分离的两组分玻色-爱因斯坦凝聚体中可以实现类似的复合孤子。讨论了阿贝尔-希格斯模型中的拓扑孤子与两组分玻色-爱因斯坦凝聚体中的拓扑孤子的异同。基于规范理论的表述,我们引入了“boojum荷”来刻画玻色-爱因斯坦凝聚体中的“D膜孤子”。

英文摘要:

In certain field theoretical models, composite solitons consisting of a domain wall and vortex lines attached to the wall have been referred to as D-brane solitons. We show that similar composite solitons can be realized in phase-separated two-component Bose-Einstein condensates. We discuss the similarities and differences between topological solitons in the Abelian-Higgs model and those in two-component Bose-Einstein condensates. Based on the formulation of gauge theory, we introduce the "boojum charge" to characterize the "D-brane soliton" in Bose-Einstein condensates.

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