论文标题
用Bose-Einstein冷凝物的语音重力渐变测定法
Phononic gravity gradiometry with Bose-Einstein condensates
论文作者
论文摘要
Bose-Einstein冷凝物（BEC）的重力渐变测定法已达到前所未有的精确度。该技术的基础是通过干扰单原子波函数来测量差异力。在本文中，我们提出了一种渐进式方案，其中使用了声子，而是使用被困BEC原子的集体振荡。我们表明，原则上，我们的方案可以实现对诸如地球或小球的重力梯度的高精度测量，而质量降低到毫克量表。我们的重力层级计算方案的基本误差结合对应于在BEC的长度尺度上实现纳米-GAL范围中的差异力灵敏度。
Gravity gradiometry with Bose-Einstein condensates (BECs) has reached unprecedented precisions. The basis of this technique is the measurement of differential forces by interference of single-atom wave functions. In this article, we propose a gradiometry scheme where phonons, the collective oscillations of a trapped BEC's atoms are used instead. We show that our scheme could, in principle, enable high-precision measurements of gravity gradients of bodies such as the Earth or small spheres with masses down to the milligram scale. The fundamental error bound of our gravity gradiometry scheme corresponds to a differential force sensitivity in the nano-gal range per experimental realization on the length scale of the BEC.
