论文标题
具有强非本地相互作用的费米气体的淬灭动力学
Quench Dynamics of a Fermi Gas with Strong Non-Local Interactions
论文作者
论文摘要
我们使用Rydberg敷料在光学晶格中诱导2D费米气体中的强烈非本地相互作用。该系统大致由$ T-V $模型在正方形晶格上大致描述，那里的Fermions体验了各向同性的最近邻居相互作用，并且只能沿一个方向跳。我们使用多体的拉姆西干涉法测量相互作用，并研究隧道遇到的气体的寿命，发现隧道不会降低寿命。为了探测非本地相互作用与隧道的相互作用，我们研究了气体中电荷密度波的短时弛豫动力学。我们发现强烈的最近的邻居相互作用减慢了放松。我们的工作为具有强烈非本地相互作用（例如扩展的费米 - 哈伯德模型）进行量子模拟打开了大门。
We induce strong non-local interactions in a 2D Fermi gas in an optical lattice using Rydberg dressing. The system is approximately described by a $t-V$ model on a square lattice where the fermions experience isotropic nearest-neighbor interactions and are free to hop only along one direction. We measure the interactions using many-body Ramsey interferometry and study the lifetime of the gas in the presence of tunneling, finding that tunneling does not reduce the lifetime. To probe the interplay of non-local interactions with tunneling, we investigate the short-time relaxation dynamics of charge density waves in the gas. We find that strong nearest-neighbor interactions slow down the relaxation. Our work opens the door for quantum simulations of systems with strong non-local interactions such as extended Fermi-Hubbard models.
