Realization of a Fermi-Hubbard Optical Tweezer Array
Realization of a Fermi-Hubbard Optical Tweezer Array
复制标题
费米-哈伯德光镊阵列的实现
DOI：
10.1103/physrevlett.128.223202
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发表时间：
2022
影响因子：
8.6
通讯作者：
Bakr, Waseem S.
中科院分区：
文献类型：
--
作者：
Spar, Benjamin M.;Guardado-Sanchez, Elmer;Chi, Sungjae;Yan, Zoe Z.;Bakr, Waseem S.
我们在光镊阵列中使用锂 6 原子来实现接近半填充的八位点费米-哈伯德链。我们通过将镊子阵列与量子气体显微镜相结合来实现单点检测。通过将能量偏移的无序度减少到小于隧道能量，我们观察到具有强反铁磁相关性的莫特绝缘体。测量的自旋相关性使我们能够为每个原子的熵设定一个上限，与光学晶格实现的最低熵相当。此外，我们通过在一把镊子上初始化原子并观察整个阵列的隧道动力学以获得均匀和交错的一维几何形状，建立了镊子平台的灵活性。
We use lithium-6 atoms in an optical tweezer array to realize an eight-site Fermi-Hubbard chain near half filling. We achieve single site detection by combining the tweezer array with a quantum gas microscope. By reducing disorder in the energy offsets to less than the tunneling energy, we observe Mott insulators with strong antiferromagnetic correlations. The measured spin correlations allow us to put an upper bound on the entropy ofper atom, comparable to the lowest entropies achieved with optical lattices. Additionally, we establish the flexibility of the tweezer platform by initializing atoms on one tweezer and observing tunneling dynamics across the array for uniform and staggered 1D geometries.