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Boll M, Hilker TA, Salomon G, et al. Spin- and density-resolved microscopy of antiferromagnetic correlations in Fermi-Hubbard chains. Science. 2016;353(6305):1257-60doi: 10.1126/science.aag1635.
Boll, M., Hilker, T. A., Salomon, G., Omran, A., Nespolo, J., Pollet, L., Bloch, I., & Gross, C. (2016). Spin- and density-resolved microscopy of antiferromagnetic correlations in Fermi-Hubbard chains. Science (New York, N.Y.), 353(6305), 1257-60. https://doi.org/10.1126/science.aag1635
Boll, Martin, et al. "Spin- and density-resolved microscopy of antiferromagnetic correlations in Fermi-Hubbard chains." Science (New York, N.Y.) vol. 353,6305 (2016): 1257-60. doi: https://doi.org/10.1126/science.aag1635
Boll M, Hilker TA, Salomon G, Omran A, Nespolo J, Pollet L, Bloch I, Gross C. Spin- and density-resolved microscopy of antiferromagnetic correlations in Fermi-Hubbard chains. Science. 2016 Sep 16;353(6305):1257-60. doi: 10.1126/science.aag1635. PMID: 27634528.
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Science. 2016 Sep 16;353(6305):1257-60. doi: 10.1126/science.aag1635.

Spin- and density-resolved microscopy of antiferromagnetic correlations in Fermi-Hubbard chains.

Science (New York, N.Y.)

Martin Boll, Timon A Hilker, Guillaume Salomon, Ahmed Omran, Jacopo Nespolo, Lode Pollet, Immanuel Bloch, Christian Gross

Affiliations

  1. Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany.
  2. Fakultät für Physik, Ludwig-Maximilians-Universität, 80799 München, Germany.
  3. Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany. Fakultät für Physik, Ludwig-Maximilians-Universität, 80799 München, Germany.
  4. Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany. [email protected].

PMID: 27634528 DOI: 10.1126/science.aag1635

Abstract

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 s* = 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.

Copyright © 2016, American Association for the Advancement of Science.

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