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Revealing hidden antiferromagnetic correlations in doped Hubbard chains via string correlators
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Revealing hidden antiferromagnetic correlations in doped Hubbard chains via string correlators
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Journal Article
Revealing hidden antiferromagnetic correlations in doped Hubbard chains via string correlators
2017
Overview
Topological phases, like the Haldane phase in spin-1 chains, defy characterization through local order parameters. Instead, nonlocal string order parameters can be employed to reveal their hidden order. Similar diluted magnetic correlations appear in doped one-dimensional lattice systems owing to the phenomenon of spin-charge separation. Here we report on the direct observation of such hidden magnetic correlations via quantum gas microscopy of hole-doped ultracold Fermi-Hubbard chains. The measurement of nonlocal spin-density correlation functions reveals a hidden finite-range antiferromagnetic order, a direct consequence of spin-charge separation. Our technique, which measures nonlocal order directly, can be readily extended to higher dimensions to study the complex interplay between magnetic order and density fluctuations.
Publisher
American Association for the Advancement of Science,The American Association for the Advancement of Science
Subject
