Spin- and density-resolved microscopy of antiferromagnetic correlations in Fermi-Hubbard chains
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- Martin Boll
- Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany.
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- Timon A. Hilker
- Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany.
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- Guillaume Salomon
- Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany.
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- Ahmed Omran
- Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany.
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- Jacopo Nespolo
- Fakultät für Physik, Ludwig-Maximilians-Universität, 80799 München, Germany.
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- Lode Pollet
- Fakultät für Physik, Ludwig-Maximilians-Universität, 80799 München, Germany.
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- Immanuel Bloch
- Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany.
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- Christian Gross
- Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany.
説明
<jats:p> The repulsive Hubbard Hamiltonian is one of the foundational models describing strongly correlated electrons and is believed to capture essential aspects of high-temperature superconductivity. Ultracold fermions in optical lattices allow for the simulation of the Hubbard Hamiltonian with control over kinetic energy, interactions, and doping. A great challenge is to reach the required low entropy and to observe antiferromagnetic spin correlations beyond nearest neighbors, for which quantum gas microscopes are ideal. Here, we report on the direct, single-site resolved detection of antiferromagnetic correlations extending up to three sites in spin-1/2 Hubbard chains, which requires entropies per particle well below <jats:italic>s</jats:italic> * = ln(2). The simultaneous detection of spin and density opens the route toward the study of the interplay between magnetic ordering and doping in various dimensions. </jats:p>
収録刊行物
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- Science
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Science 353 (6305), 1257-1260, 2016-09-16
American Association for the Advancement of Science (AAAS)