Creating vortons and three-dimensional skyrmions from domain-wall annihilation with stretched vortices in Bose-Einstein condensates
Creating vortons and three-dimensional skyrmions from domain-wall annihilation with stretched vortices in Bose-Einstein condensates
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DOI：
10.1103/physreva.85.053639
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发表时间：
2012-03
影响因子：
2.9
通讯作者：
M. Nitta;K. Kasamatsu;M. Tsubota;H. Takeuchi
中科院分区：
文献类型：
--
作者：
M. Nitta;K. Kasamatsu;M. Tsubota;H. Takeuchi
本文研究了在两种凝聚物的序参量为1和2的相分离双组分BECs中产生涡旋或三维skyrion的机理。我们考虑一对由涡旋（弦）拉伸的畴壁（膜）和反畴壁（反膜），其中具有涡旋缠绕的畴2被两个畴1组成的畴夹在中间。当畴壁对湮灭时，就会出现涡。实验上，这可以通过制备1、2、a和1分量的相分离来实现，其中1分量的暗孤子的节点面充满了具有涡度的2分量。通过共振激光束选择性地逐渐去除填充的2组分，可以使膜和反膜发生碰撞，产生涡旋。
We study a mechanism to create a vorton or three-dimensional skyrmion in phase-separated two-component BECs with the order parameters � 1 and � 2 of the two condensates. We consider a pair of a domain wall (brane) and an antidomain wall (antibrane) stretched by vortices (strings),where the � 2 component with a vortex winding is sandwiched by two domains of the � 1 component. The vortons appear when the domain wall pair annihilates. Experimentally, this can be realized by preparing the phase separation in the order � 1, � 2 ,a nd� 1 components, where the nodal plane of a dark soliton in � 1 component is filled with the � 2 component with vorticity. By selectively removing the filling � 2 component gradually with a resonant laser beam, the collision of the brane and antibrane can be made, creating vortons.