Limit behavior of attractive Bose-Einstein condensates passing an obstacle
Limit behavior of attractive Bose-Einstein condensates passing an obstacle
复制标题
有吸引力的玻色-爱因斯坦凝聚体通过障碍物的极限行为
DOI:
10.1016/j.jde.2020.10.002
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发表时间:
2021-01
影响因子:
2.4
通讯作者:
Xu Liangshun
中科院分区:
文献类型:
--
作者:
Deng Yinbin;Guo Yujin;Xu Liangshun
In this paper, we mainly investigate ground states of trapped attractive Bose-Einstein condensates (BEC) passing an obstacle in the plane, which can be described by an L 2-critical constraint minimization problem in an exterior domain Ω= R 2∖ ω, where the bounded convex domain ω⊂ R 2 with smooth boundary denotes the region of the obstacle. It is shown that minimizers (ie ground states) exist, if and only if the interaction strength a satisfies a< a⁎=‖ Q‖ 2 2, where Q> 0 is the unique positive radial solution of Δ u− u+ u 3= 0 in R 2. If the trapping potential V (x) attains its global minima only along the whole boundary∂ Ω, the limit behavior of minimizers is analyzed as a↗ a⁎ by employing the Pohozaev identity and the delicate energy analysis, where the mass concentration occurs at the flattest critical point of V (x) on∂ Ω.
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影响因子:
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期刊:
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