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    • Phi Kappa Phi Student Research and Fine Arts Conference
    • 17th Annual Phi Kappa Phi Student Research and Fine Arts Conference (2016)
    • 17th Annual Phi Kappa Phi Student Research and Fine Arts Conference: Oral Symposia I
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    Studying the Interplay between Superconductivity and Anti-Ferromag-Netism through Bose-Fermi Mixtures on Optical Lattices

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    Authors
    Brackett, Jeremy
    Issue Date
    2016-03
    URI
    http://hdl.handle.net/10675.2/602104
    
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    Abstract
    Motivated by the recent experimental progress with ultra-cold atoms, we investigate the physics of a Bose-Fermi mixture on a two dimensional optical lattice. We treat the system parameters such that 2-component fermions are in a deep external trap and weakly interacting bosons are in a shallow external trap, however both of these atoms are subjected to the same optical lattice. In this parameter regime, the bosons form a Bose-Einstein condensate and mediate an attractive interaction between fermions through low energy Bose excitations. As a result, the dynamics of the fermions can be described by the single band Hubbard model that involves on-site repulsive interaction and elementary excitation mediated attractive interactions. Using a mean field theory, we derive an effective action up to the quartic order in both d-wave superconducting and anti-ferromagnetic order parameters. Using this Landau energy functional, we then discuss the phase transition and study the competition and/or cooperation of anti-ferromagnetism and d-wave superconductivity in the system.
    Affiliation
    Department of Chemistry and Physics
    Description
    Presentation given at the 17th Annual Phi Kappa Phi Student Research and Fine Arts Conference
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    17th Annual Phi Kappa Phi Student Research and Fine Arts Conference: Oral Symposia I

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