Two-dimensional anisotropic vortex quantum droplets in dipolar Bose-Einstein condensates

IF 6.5 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY
Guilong Li, Xunda Jiang, Bin Liu, Zhaopin Chen, Boris A. Malomed, Yongyao Li
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引用次数: 4

Abstract

Creation of stable intrinsically anisotropic self-bound states with embedded vorticity is a challenging issue. Previously, no such states in Bose–Einstein condensates (BECs) or other physical settings were known. Dipolar BEC suggests a unique possibility to predict stable two dimensional anisotropic vortex quantum droplets (2D-AVQDs). We demonstrate that they can be created with the vortex axis oriented perpendicular to the polarization of dipoles. The stability area and characteristics of the 2D-AVQDs in the parameter space are revealed by means of analytical and numerical methods. Further, the rotation of the polarizing magnetic field is considered, and the largest angular velocities, up to which spinning 2D-AVQDs can follow the rotation in clockwise and anti-clockwise directions, are found. Collisions between moving 2D-AVQDs are studied too, demonstrating formation of bound states with a vortex-antivortex-vortex structure. A stability domain for such stationary bound states is identified. Unstable dipolar states, that can be readily implemented by means of phase imprinting, quickly transform into robust 2D-AVQDs, which suggests a straightforward possibility for the creation of these states in the experiment.

Abstract Image

二极玻色-爱因斯坦凝聚态中的二维各向异性涡旋量子液滴
创建具有嵌入涡度的稳定的本征各向异性自约束态是一个具有挑战性的问题。此前,在玻色-爱因斯坦凝聚态(BEC)或其他物理环境中还没有发现过这种状态。双极 BEC 为预测稳定的二维各向异性涡旋量子滴(2D-AVQDs)提供了独特的可能性。我们证明,它们可以在涡轴方向垂直于偶极子极化的情况下产生。我们通过分析和数值方法揭示了 2D-AVQD 在参数空间中的稳定区域和特性。此外,还考虑了极化磁场的旋转,并找到了旋转的二维-AVQD 在顺时针和逆时针方向上的最大角速度。此外,还研究了移动的二维-AVQD 之间的碰撞,证明了具有涡旋-反涡旋-涡旋结构的束缚态的形成。确定了这种静止束缚态的稳定域。不稳定的双极性态可以通过相位印记的方式轻松实现,并迅速转化为稳健的二维-AVQD,这表明在实验中直接创建这些态是可能的。
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来源期刊
Frontiers of Physics
Frontiers of Physics PHYSICS, MULTIDISCIPLINARY-
CiteScore
9.20
自引率
9.30%
发文量
898
审稿时长
6-12 weeks
期刊介绍: Frontiers of Physics is an international peer-reviewed journal dedicated to showcasing the latest advancements and significant progress in various research areas within the field of physics. The journal's scope is broad, covering a range of topics that include: Quantum computation and quantum information Atomic, molecular, and optical physics Condensed matter physics, material sciences, and interdisciplinary research Particle, nuclear physics, astrophysics, and cosmology The journal's mission is to highlight frontier achievements, hot topics, and cross-disciplinary points in physics, facilitating communication and idea exchange among physicists both in China and internationally. It serves as a platform for researchers to share their findings and insights, fostering collaboration and innovation across different areas of physics.
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