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arXiv 2401.10481cond-mat.quant-gasnlin.PS
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二元四极凝聚体中的二维量子液滴

Two-dimensional quantum droplets in binary quadrupolar condensates

Aowei Yang, Jiahao Zhou, Xiaoqing Liang, Guilong Li, Bin Liu, Huan-Bo Luo, Boris A Malomed, Yongyao Li

AI总结:

本文用含 MQQI 与 LHY 修正的 Gross-Pitaevskii 模型,研究二元四极 Bose-Einstein 凝聚体中稳定二维基态及 S<4 涡旋量子液滴,并解析预测其性质、模拟碰撞。

摘要:

我们研究了由具有磁四极-四极相互作用(MQQIs)的二元 Bose-Einstein 凝聚体形成的基态型和涡旋型二维(2D)准各向同性量子液滴(QDs)的稳定性与特性。磁四极子被构建为沿 x 轴极化的偶极子与反偶极子对。MQQIs 通过施加沿 x 轴变化的外磁场而诱导产生。该系统由包含 MQQIs 以及对平均场近似的 Lee-Huang-Yang 修正的 Gross-Pitaevskii 方程组建模。对于四极子平行于系统二维平面极化的构型,利用虚时间积分方法产生了稳定的二维基态 QDs 和拓扑荷 S<4 的准各向同性涡旋 QDs。详细研究了范数和 MQQI 强度对 QDs 的影响。借助 Thomas-Fermi 近似,以解析形式获得了若干结果,包括对 QDs 有效面积、化学势和峰值密度的准确预测。还通过系统模拟研究了运动 QDs 之间的碰撞。

英文摘要:

We study the stability and characteristics of two-dimensional (2D) quasi-isotropic quantum droplets (QDs) of fundamental and vortex types, formed by binary Bose-Einstein condensate with magnetic quadrupole-quadrupole interactions (MQQIs). The magnetic quadrupoles are built as pairs of dipoles and antidipoles polarized along the x-axis. The MQQIs are induced by applying an external magnetic field that varies along the x-axis. The system is modeled by the Gross-Pitaevskii equations including the MQQIs and Lee-Huang-Yang correction to the mean-field approximation. Stable 2D fundamental QDs and quasi-isotropic vortex QDs with topological charges S<4 are produced by means of the imaginary-time-integration method for configurations with the quadrupoles polarized parallel to the systems two-dimensional plane. Effects of the norm and MQQI strength on the QDs are studied in detail. Some results, including an accurate prediction of the effective area, chemical potential, and peak density of QDs, are obtained in an analytical form by means of the Thomas-Fermi approximation. Collisions between moving QDs are studied by means of systematic simulations.

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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