标题： 通过玻色-爱因斯坦凝聚体类似物中的小各向异性探测宇宙膨胀 显示英文标题

标题： Probing cosmic expansion through small anisotropies in a Bose-Einstein condensate analogue

摘要： 在本信中，研究表明通过测量类比宇宙当前状态下的密度方差等量，可以评估其历史信息，因为早期存在微小的各向异性，这里用非均匀密度来建模。 这提供了一个有价值的工具来探测和比较宇宙膨胀模型，并且作为一个应用，表明量子涨落可能对可观测宇宙产生显著影响，这取决于宇宙的历史。 显示英文摘要

摘要： In this letter, it is shown that by measuring quantities like density variance in the present state of an analogue universe one can assess information about its history due to the mere existence of small anisotropies in earlier times, here modeled by non-uniform densities. This offers a valuable tool to probe and compare cosmic expansion models and, as an application, it is shown that quantum fluctuations can have a significant impact on the observable universe depending on its history.