Two-Dimensional Homogeneous Fermi Gases.
Two-Dimensional Homogeneous Fermi Gases.
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DOI：
10.1103/physrevlett.120.060402
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发表时间：
2017-04
影响因子：
8.6
通讯作者：
K. Hueck;Niclas Luick;L. Sobirey;J. Siegl;T. Lompe;H. Moritz
中科院分区：
文献类型：
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作者：
K. Hueck;Niclas Luick;L. Sobirey;J. Siegl;T. Lompe;H. Moritz
我们报告了在盒势中捕获均匀二维 (2D) 费米气体的实验实现。与谐波捕获气体相比，这些均质二维系统非常适合探测强相互作用多体系统的局部和非局部特性。作为第一个基准实验，我们使用局部探针来测量非相互作用二维费米气体的密度作为化学势的函数，并发现与相应的状态方程非常一致。然后，我们进行物质波聚焦以提取系统的动量分布，并直接观察动量状态接近单位占据的泡利阻塞。最后，我们测量了相互作用的均匀二维气体在吸引相互作用的费米子和玻色子二聚体之间的交叉中的动量分布。
We report on the experimental realization of homogeneous two-dimensional (2D) Fermi gases trapped in a box potential. In contrast to harmonically trapped gases, these homogeneous 2D systems are ideally suited to probe local as well as nonlocal properties of strongly interacting many-body systems. As a first benchmark experiment, we use a local probe to measure the density of a noninteracting 2D Fermi gas as a function of the chemical potential and find excellent agreement with the corresponding equation of state. We then perform matter wave focusing to extract the momentum distribution of the system and directly observe Pauli blocking in a near unity occupation of momentum states. Finally, we measure the momentum distribution of an interacting homogeneous 2D gas in the crossover between attractively interacting fermions and bosonic dimers.