Measurement of the Canonical Equation of State of a Weakly Interacting 3D Bose Gas.
Measurement of the Canonical Equation of State of a Weakly Interacting 3D Bose Gas.
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弱相互作用 3D 玻色气体的正则状态方程的测量。
DOI：
10.1103/physrevlett.125.150404
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发表时间：
2020
影响因子：
8.6
通讯作者：
Gabriele Ferrari
中科院分区：
文献类型：
--
作者：
C. Mordini;D. Trypogeorgos;A. Farolfi;L. Wolswijk;S. Stringari;G. Lamporesi;Gabriele Ferrari
在局域密度近似下，利用对简谐囚禁玻色气体的多重图像重建方法，确定了均匀物质在临界点上的物态方程。我们的实验结果提供了压力作为比体积的函数的正则描述，强调了相互作用导致的与理想玻色气体行为的戏剧性偏离。它们还为化学势随温度的非单调行为提供了明确的证据，这是超流和玻色-爱因斯坦凝聚的结果。测量的热力学参数与可用于相互作用玻色气体的平均场预测进行了比较。文中还讨论了临界点附近局部密度近似的适用范围，重点讨论了等温可压缩性的行为。
Using a multiple-image reconstruction method applied to a harmonically trapped Bose gas, we determine the equation of state of uniform matter across the critical transition point, within the local density approximation. Our experimental results provide the canonical description of pressure as a function of the specific volume, emphasizing the dramatic deviations from the ideal Bose gas behavior caused by interactions. They also provide clear evidence for the nonmonotonic behavior with temperature of the chemical potential, which is a consequence of superfluidity and Bose-Einstein condensation. The measured thermodynamic quantities are compared to mean-field predictions available for the interacting Bose gas. The limits of applicability of the local density approximation near the critical point are also discussed, focusing on the behavior of the isothermal compressibility.
影响因子：
2.9
作者：
Gotlibovych, Igor;Schmidutz, Tobias F.;Hadzibabic, Zoran
通讯作者：
Hadzibabic, Zoran