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arXiv 2104.15089nlin.PS
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一个作为活动粒子的原子亮矢量孤子

An atomic bright vector soliton as an active particle

Timo Eichmann, James R. Anglin

摘要:

一般来说,孤子是扩展场的结构,它们像孤立的粒子一样运动。两分量自吸引玻色-爱因斯坦凝聚体中可以产生矢量明孤子。如果凝聚体的成分具有不同的化学势,孤子的总自旋可以作为内能库,使孤子成为\emph{active}粒子,能够利用粒子内部携带的能量对抗外力移动-如果存在一种动力学机制,将能量从孤子自旋稳定地转移到孤子运动。在这里,我们提出了这样一个动力学机制,将其嵌入在一个旋量凝聚平均场的更大的系统内的实验可行的方式,并显示如何实现一个孤立子的活性粒子的机制。在什么可以被认为是一个玩具模型的项目超越玩具模型的活性粒子,我们测试的活动机制的鲁棒性,通过探索一系列的变形,以最简单的模型嵌入非线性机制的凝聚系统。

英文摘要:

Solitons in general are configurations of extended fields which move like isolated particles. Vector bright solitons can occur in a two-component self-attractive Bose-Einstein condensate. If the components of the condensate have different chemical potentials, the total spin of the soliton can serve as an internal energy depot that makes the soliton into an \emph{active} particle, able to move against an external force using energy carried within the particle -- if there is a dynamical mechanism for steadily transferring energy from soliton spin into soliton motion. Here we present such a dynamical mechanism, embed it in an experimentally feasible way within the larger system of a spinor condensate mean field, and show how the mechanism works to realize a solitonic active particle. In what can be considered a toy model for the project of going beyond toy models for active particles, we test the robustness of the activity mechanism by exploring a range of deformations to the simplest model for embedding the nonlinear mechanism in the condensate system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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