Tunable nanomagnetism in moderately cold fermions on optical lattices
Tunable nanomagnetism in moderately cold fermions on optical lattices
Localized defects, unavoidable in real solids, may be simulated in (generically defect-free) cold-atom systems, e.g., via modifications of the optical lattice. We study the Hubbard model on a square lattice with single impurities, pairs of nearby impurities, or lines of impurities using numerically exact determinantal quantum Monte Carlo simulations. In …