Achieving the Neel state in an optical lattice

Arnaud Koetsier; R. A. Duine; Immanuel Bloch; H. T. C. Stoof

doi:10.1103/physreva.77.023623

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arXiv · 0711.3425

Achieving the Neel state in an optical lattice

Arnaud Koetsier·R. A. Duine·Immanuel Bloch·H. T. C. Stoof

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Abstract

We theoretically study the possibility of reaching the antiferromagnetic phase of the Hubbard model by starting from a normal gas of trapped fermionic atoms and adiabatically ramping up an optical lattice. Requirements on the initial temperature and the number of atoms are determined for a three dimensional square lattice by evaluating the Neel state entropy, taking into account fluctuations around the mean-field solution. We find that these fluctuations place important limitations on adiabatically reaching the Neel state.

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Arnaud Koetsier, R. A. Duine, Immanuel Bloch, H. T. C. Stoof. 2008-02-26. Achieving the Neel state in an optical lattice. https://doi.org/10.1103/physreva.77.023623

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