Doublon-Hole Correlations and Fluctuation Thermometry in a Fermi-Hubbard Gas
Name
PhysRevLett.125.113601.pdf
Description
Published version
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1015.13 KB
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Adobe PDF
Checksum (MD5)
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Author(s)
Hartke, Thomas
Oreg, Botond
Jia, Ningyuan
Zwierlein, Martin
Date Issued
2020
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Version
Final published version
Abstract
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 nonlocal 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT-Harvard Center for Ultracold Atoms
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.125.113601
