Superfluidity-insulator phase transition in ensemble of Fermi atoms in optical lattice |
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Authors: | V. A. Kashurnikov and A. V. Krasavin |
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Affiliation: | 1.National Research Nuclear University MEPhI,Moscow,Russia |
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Abstract: | An ultracold Fermi gas in an optical lattice with a parabolic potential is modeled by the quantum Monte Carlo method. The gas density profile is calculated in the Hubbard model; it is shown that a domain with a density of one atom per site is formed in the trap that corresponds to the Mott insulator state. The insulator phase is surrounded by a superfluid region occupying the center of the trap, as well as its periphery. |
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