论文标题
Fermi-Hubbard气体中的Doublon-Hole相关性和波动温度计
Doublon-hole correlations and fluctuation thermometry in a Fermi-Hubbard gas
论文作者
论文摘要
我们报告了2D费米 - 哈伯德模型的冷原子实现中总密度的单个原子和单位分辨的检测。双元的荧光成像是通过将每个晶格位点拆分成双井来实现的，从而将原子对分开。全密度读数可以直接测量状态方程，包括通过波动散文定理进行直接的温度测量值。位置分辨的密度相关性揭示了Pauli孔在低填充时的孔，并且在一半填充的附近，较强的Doublon孔相关性。这些证明可以解释莫特绝缘子中局部和非本地密度波动之间的差异。我们的技术可以研究在费米 - 哈伯德模型，分子的位置分辨观察以及创建双层费米 - 哈伯德系统中的原子分辨电荷转运。
We report on the single atom and single site-resolved detection of the total density in a cold atom realization of the 2D Fermi-Hubbard model. Fluorescence imaging of doublons is achieved by splitting each lattice site into a double well, thereby separating atom pairs. Full density readout yields a direct measurement of the equation of state, including direct thermometry via the fluctuation-dissipation theorem. Site-resolved density correlations reveal the Pauli hole at low filling, and strong doublon-hole correlations near half filling. These are shown to account for the difference between local and non-local density fluctuations in the Mott insulator. Our technique enables the study of atom-resolved charge transport in the Fermi-Hubbard model, the site-resolved observation of molecules, and the creation of bilayer Fermi-Hubbard systems.
