发表机构
Universitat Politècnica de Catalunya（加泰罗尼亚理工大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文研究二维量子反偶极粒子系统，计算其物态与结构性质，发现其液态特性及低密度下的一级相变，还分析了双层几何中层间距对液相性质的影响。
AI 中文摘要
具有磁矩的粒子可通过磁场极化并快速旋转，使它们之间的偶极相互作用符号发生改变，成为反偶极，从而在平面内表现为各向同性吸引。极性分子也可通过微波修饰场进行操控，以反转偶极-偶极相互作用的符号。本研究通过计算物态方程和结构性质，对二维反偶极粒子系统展开研究：即使散射长度显著大于偶极长度，该系统仍表现为液态；当密度足够大时，系统会通过一级相变转变为每个格点含一个粒子的固态，且发生相变的密度远低于偶极对应系统。此外，受近期强轴向束缚双层几何（Science 384, 546-551 (2024)）实现的启发，本研究还探讨了双层液相的性质随层间距的变化规律，给出了一层可影响另一层性质的参数范围。
英文摘要
Particles with magnetic moment can be polarized, and rapidly rotated, employing a magnetic field such that the dipolar interaction among them changes sign, becoming antidipolar and thus isotropically attractive in a plane. Polar molecules can also be manipulated using microwave dressing fields to invert the sign of the dipole-dipole interaction. In this work, we study a two-dimensional system of antidipolar particles by calculating its equation of state and structural properties. The system behaves as a liquid even for scattering lengths significantly greater than the dipolar length. For large enough densities, the system transitions to a solid with one particle per lattice site via a first-order phase transition at a significantly smaller density than its dipolar counterpart. Moreover, motivated by the recent realization of a strongly axially trapped, bilayer geometry [Science 384, 546-551 (2024)], we study the properties of the bilayer liquid phase as the inter-layer distance is tuned, and provide the range of parameters where one layer can influence the properties of the other.
Comments9 pages, 8 figures
