论文标题
一维谐波陷阱中集体液滴激发的相关动力学
Correlated dynamics of collective droplet excitations in a one-dimensional harmonic trap
论文作者
论文摘要
我们通过部署非扰动方法来解决一维和谐限制的量子液滴的存在和动力学，并以两种组分的混合物形式出现。我们发现，在对称的同核设置中，除了Lee-huang-yang相关性之外，还会导致扁平液滴配置，以减少组合物吸引力或更大的原子数。不对称混合物具有相关组件之间的空间混合，具有更强的相互作用或更重的表现出平坦的结构。在谐波陷阱上施加淬火，我们触发了最低的集体液滴激发。在相关性存在下，相互作用依赖的呼吸频率略有降低，显示出更强的吸引力的趋势下降。在Lee-huang-yang框架内还获得了半分析预测。对于相对较大的淬火幅度，液滴在其核心中逐渐脱落和更高的运动激励。同时，增强了组合纠缠和远程两体内组件相关性。相比之下，无论系统参数如何，偶极运动仍然保持强大。物种选择性淬灭导致相关引起的液滴的脱位或由于集合碰撞而导致的不规则偶极模式。
We address the existence and dynamics of one-dimensional harmonically confined quantum droplets, appearing in two-component mixtures by deploying a nonperturbative approach. We find that, in symmetric homonuclear settings, beyond Lee-Huang-Yang correlations result in flat-top droplet configurations for either decreasing intercomponent attraction or larger atom number. Asymmetric mixtures feature spatial mixing among the involved components with the more strongly interacting or heavier one exhibiting flat-top structures. Applying quenches on the harmonic trap we trigger the lowest-lying collective droplet excitations. The interaction-dependent breathing frequency, being slightly reduced in the presence of correlations, shows a decreasing trend for stronger attractions. Semi-analytical predictions are also obtained within the Lee-Huang-Yang framework. For relatively large quench amplitudes the droplet progressively delocalizes and higher-lying motional excitations develop in its core. Simultaneously, enhanced intercomponent entanglement and long-range two-body intracomponent correlations arise. In sharp contrast, the dipole motion remains robust irrespectively of the system parameters. Species selective quenches lead to a correlation-induced dephasing of the droplet or to irregular dipole patterns due to intercomponent collisions.
