Control of Dy164 Bose-Einstein condensate phases and dynamics with dipolar anisotropy
Control of Dy164 Bose-Einstein condensate phases and dynamics with dipolar anisotropy
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DOI：
10.1103/physrevresearch.4.043124
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发表时间：
2022-05
影响因子：
4.2
通讯作者：
S. Halder;K. Mukherjee;S. Mistakidis;S. Das;P. Kevrekidis;P. Panigrahi;Soumya Majumder;H. Sadeghpour
中科院分区：
文献类型：
--
作者：
S. Halder;K. Mukherjee;S. Mistakidis;S. Das;P. Kevrekidis;P. Panigrahi;Soumya Majumder;H. Sadeghpour
研究了Dy原子的准一维和二维偶极玻色-爱因斯坦凝聚（dBEC）在快速旋转磁场作用下的猝灭动力学.因此，磁场控制了偶极电位的大小和符号。我们考虑到量子涨落，在扩展的Gross-Pitaevskii形式主义，其中包括所谓的李-黄-杨（LHY）修正的奇异量子液滴和超固相的形成至关重要。分析变分分析法使我们能够得到超流相和液滴相的相图。从超流到超固相，到单个和液滴阵列的交叉是用粒子数和偶极相互作用来探测的。偶极强度通过旋转磁场来调谐，随后对相边界产生影响。在上述阶段的相互作用淬火后，我们监测超固体团簇或液滴晶格的动态形成。我们包括由于三体复合的交叉制度，其中的三体复合率系数与散射长度（$a_s $）或偶极长度（$a_{dd}$）的四次方的规模损失。对于无因次参数$\epsilon_{dd}= a_{dd}/a_s $的固定值，调整偶极各向异性会导致液滴寿命的增强。
We investigate the quench dynamics of quasi-one and two dimensional dipolar Bose-Einstein condensates (dBEC) of $^{164}$Dy atoms under the influence of a fast rotating magnetic field. The magnetic field thus controls both the magnitude and sign of the dipolar potential. We account for quantum fluctuations, critical to formation of exotic quantum droplet and supersolid phases in the extended Gross-Pitaevskii formalism, which includes the so-called Lee-Huang-Yang (LHY) correction. An analytical variational ansatz allows us to obtain the phase diagrams of the superfluid and droplet phases. The crossover from the superfluid to the supersolid phase and to single and droplet arrays is probed with particle number and dipolar interaction. The dipolar strength is tuned by rotating the magnetic field with subsequent effects on phase boundaries. Following interaction quenches across the aforementioned phases, we monitor the dynamical formation of supersolid clusters or droplet lattices. We include losses due to three-body recombination over the crossover regime, where the three-body recombination rate coefficient scales with the fourth power of the scattering length ($a_s$) or the dipole length ($a_{dd}$). For fixed values of the dimensionless parameter, $\epsilon_{dd} = a_{dd}/a_s$, tuning the dipolar anisotropy leads to an enhancement of the droplet lifetimes.