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arXiv 2504.02485cond-mat.quant-gas
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准二维体系中的倾斜偶极玻色子:从液态条纹到液滴

Tilted dipolar bosons in the quasi-two-dimensional regime: From liquid stripes to droplets

Juan Sánchez-Baena

AI总结:

本研究通过变分计算与扩展Gross-Pitaevskii方程对比,表征了准二维倾斜偶极子在热力学极限下的相图,揭示了条纹液态与液滴形成,为超固态条纹态实验提供参数指导。

摘要:

我们表征了在准二维(扁平化)几何结构且处于热力学极限下的倾斜偶极子体系。我们考虑了在当前实验中可实现的自旋z轴方向的有限束缚。我们计算了体系在高倾斜角度下处于平衡密度时的相图,在该情况下体系变得自束缚,并出现条纹液态。为了表征该体系,我们进行了变分计算,并将其与扩展Gross-Pitaevskii方程的解进行了基准对比。我们将热力学极限下的现象与有限尺寸体系的物理联系起来,为可能实现的超固态条纹态提供了参数,并研究了偶极液滴形成的临界数。我们的结果有助于指导在偶极子主导区域中准二维几何结构下偶极原子研究的潜在实验。

英文摘要:

We characterize a system of tilted dipoles in a quasi two-dimensional (flattened) geometry and in the thermodynamic limit. We consider a finite trapping in the z-axis achievable in current experiments. We compute the phase diagram of the system at its equilibrium density for high tilting angles, where it becomes self-bound, and a striped liquid state emerges. To characterize the system, we perform a variational calculation, which is benchmarked with the solution of the extended Gross-Pitaevskii equation. We connect the phenomenology in the thermodynamic limit to the physics of the finite-size system, provide parameters for the realization of potentially supersolid striped states and study the critical number for dipolar droplet formation. Our results are helpful to guide potential experiments in the study of dipolar atoms in quasi two-dimensional geometries in the dipole-dominated regime.

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