Strongly Interacting Fermi Gases Under the Microscope

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  • Date/Time:
    • Monday February 27, 2017 - Tuesday February 28, 2017
      3:00 pm - 3:59 pm
  • Location: Marcus Nano Bldg. Rm. 1116-1118
  • Phone: 404-894-8886
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Summary Sentence: Strongly Interacting Fermi Gases under the Microscope

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School of Physics Colloquium: Prof. Martin Zwierlein, Massachusetts Institute of Technology (MIT)

Strongly interacting fermions govern the physics of e.g. high-temperature superconductors, nuclear matter and neutron stars. The interplay of the Pauli principle with strong interactions can give rise to exotic properties that we do not even understand at a qualitative level. In recent years, ultracold Fermi gases of atoms have emerged as a pristine platform for the creation and study of strongly interacting systems of fermions.

Near Feshbach resonances, such gases display superfluidity at 17% of the Fermi temperature. Scaled to the density of electrons in solids, this corresponds to superfluidity far above room temperature. Confined in optical lattices, fermionic atoms realize the Fermi-Hubbard model, believed to capture the essence of cuprate high-temperature superconductors.

In recent experiments on two-dimensional Fermi gases under a microscope, we observe metallic, Mott insulating and band insulating states with single-site, single-atom resolution.

The microscope allows for the site-resolved detection of charge and spin correlations, revealing the famous Pauli and correlation hole for low and intermediate lattice fillings, and correlated doublon-hole pairs near half filling. These correlations should play an important role for transport in the Fermi-Hubbard model.

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In Campus Calendar

College of Sciences, School of Physics

Invited Audience
Faculty/Staff, Undergraduate students, Graduate students
  • Created By: Alison Morain
  • Workflow Status: Published
  • Created On: Feb 22, 2017 - 9:26am
  • Last Updated: Apr 13, 2017 - 5:12pm