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arXiv 2501.09641cond-mat.quant-gascond-mat.othercond-mat.stat-mech
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平面几何中的超固态偶极相:倾斜极化的效应

Supersolid dipolar phases in planar geometry: effects of tilted polarization

Daniel Lima, Matheus Grossklags, Vinicius Zampronio, Fabio Cinti, Alejandro Mendoza-Coto

AI总结:

该研究探究平面几何中偶极Bose-Einstein凝聚体的倾斜极化效应,发现面内极化分量将相图的单临界点转为三条临界线,引发相结构轴向形变和超流性各向异性,为相关实验与理论研究提供新方向。

摘要:

本文研究了平面几何结构中偶极Bose-Einstein凝聚体(玻色-爱因斯坦凝聚体)的行为,重点关注极化取向的影响。垂直极化会产生包含六角相、条纹相和蜂窝相的相图,这些相对于单个临界点处终结;而面内极化分量的存在会将该临界点转变为三条临界线,每条临界线分别分隔两种相,从根本上改变了相图的形态。所有相变线都包含一级和二级相变区域,且该相图本身与准一维偶极系统呈现的相图具有相似性。最后,我们研究了引入面内极化对各相结构性质的影响,并测定了超流分数。结果表明,这一过程会在六角相和蜂窝相中引发轴向形变,导致系统的长程性质(如超流性)呈现各向异性行为。我们预期观测到的丰富现象将为新的实验和理论研究提供动力。

英文摘要:

The behavior of dipolar Bose-Einstein condensates in planar geometries is investigated, focusing on the effects of the polarization orientation. While perpendicular polarization produces a phase diagram with hexagonal, stripes, and honeycomb phases ending at a single critical point, the presence of an in-plane polarization component transforms the critical point into three critical lines, separating two phases at a time and changing radically the appearance of the phase diagram. All transition lines contain first- and second-order regions, while the phase diagram itself shows a resemblance with those displayed by quasi-one-dimensional dipolar systems. Finally, we investigate the effect of introducing an in-plane polarization on the structural properties of the phases and determine the superfluid fraction. Our results show that this process induces an axial deformation on the hexagonal and honeycomb phases, resulting in an anisotropic behavior in the long distance properties of the system like superfluidity. We expect that the rich phenomenology observed provides motivation for new experiments and theoretical works.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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