Metastability of Quantum Droplet Clusters
Metastability of Quantum Droplet Clusters
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DOI：
10.1103/physrevlett.122.193902
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发表时间：
2019-05-14
影响因子：
8.6
通讯作者：
Torner, Lluis
中科院分区：
文献类型：
--
作者：
Kartashov, Yaroslav V.;Malomed, Boris A.;Torner, Lluis
我们证明了在格罗斯-皮塔夫斯基方程和Lee-Huang-Yang量子修正相结合的系统中，亚稳环状团簇可以由二维量子液滴构成。根据项链图案的初始半径和相邻量子液滴之间的相移，团簇表现出从收缩到旋转的动态行为，同时伴随着周期性的脉动或膨胀。我们表明，使用能量最小化分析，人们可以预测对应于旋转而没有径向脉动的团簇半径的平衡值。在这样的机制下，团簇以亚稳态的形式演化，经受住了基础散射长度的突然变化，并在演化过程中保持了它们的方位对称性，即使在相当大的微扰存在的情况下也是如此。
We show that metastable ring-shaped clusters can be constructed from two-dimensional quantum droplets in systems described by the Gross-Pitaevskii equations augmented with Lee-Huang-Yang quantum corrections. The clusters exhibit dynamical behavior ranging from contraction to rotation with simultaneous periodic pulsations, or expansion, depending on the initial radius of the necklace pattern and phase shift between adjacent quantum droplets. We show that, using an energy-minimization analysis, one can predict equilibrium values of the cluster radius that correspond to rotation without radial pulsations. In such a regime, the clusters evolve as metastable states, withstanding abrupt variations in the underlying scattering lengths and keeping their azimuthal symmetry in the course of evolution, even in the presence of considerable perturbations.