Novel superfluidity in a trapped gas of Fermi atoms with repulsive interaction loaded on an optical lattice.

We investigate a possibility of superfluidity in a trapped gas of Fermi atoms with a repulsive interaction in the presence of an optical lattice. Applying the exact diagonalization method to a one-dimensional Hubbard model including the trap potential, we find that, when the strength of the repulsive interaction exceeds a critical value, the binding energy… CONTINUE READING