A Fermi-Hubbard Optical Tweezer Array

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 M...

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Bibliographic Details
Published in:arXiv.org 2021-10
Main Authors: Spar, Benjamin M, Guardado-Sanchez, Elmer, Sungjae Chi, Yan, Zoe Z, Bakr, Waseem S
Format: Article
Language:English
Subjects:
Antiferromagnetism
Arrays
Insulators
Lithium
Optical lattices
Upper bounds
Online Access:Get full text
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Summary: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 of 0.26(4)\(k_\mathrm{B}\) per 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 different 1D geometries.
ISSN:2331-8422
DOI:10.48550/arxiv.2110.15398