Observing properties of an interacting homogeneous Bose-Einstein condensate: Heisenberg-limited momentum spread, interaction energy, and free-expansion dynamics
Observing properties of an interacting homogeneous Bose-Einstein condensate: Heisenberg-limited momentum spread, interaction energy, and free-expansion dynamics
复制标题
DOI：
10.1103/physreva.89.061604
复制
发表时间：
2014-06-30
影响因子：
2.9
通讯作者：
Hadzibabic, Zoran
中科院分区：
文献类型：
--
作者：
Gotlibovych, Igor;Schmidutz, Tobias F.;Hadzibabic, Zoran
利用高分辨布拉格光谱研究了光箱势场中原子玻色-爱因斯坦凝聚体的性质。对于一系列的盒子大小，高达70 μ m，我们直接观察到海森堡有限的凝聚原子的动量不确定性。我们测量的冷凝物的相互作用能的精度为k（B）× 100 pK和研究，实验和数值模拟，其自由膨胀后，从盒势释放的动力学。我们所有的测量结果都与理论预期的空间范围等于盒子大小的完全均匀的凝聚体非常一致，这也建立了我们的光学盒系统在sub-nK能量尺度上的均匀性。
We study the properties of an atomic Bose-Einstein condensate produced in an optical-box potential, using high-resolution Bragg spectroscopy. For a range of box sizes, up to 70 mu m, we directly observe Heisenberg-limited momentum uncertainty of the condensed atoms. We measure the condensate interaction energy with a precision of k(B) x 100 pK and study, both experimentally and numerically, the dynamics of its free expansion upon release from the box potential. All our measurements are in good agreement with theoretical expectations for a perfectly homogeneous condensate of spatial extent equal to the size of the box, which also establishes the uniformity of our optical-box system on a sub-nK energy scale.