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Topological phase transitions in the repulsively interacting Haldane-Hubbard model
Tuomas I. Vanhala, Topi Siro, Long Liang +3
Using dynamical mean-field theory and exact diagonalization we study the phase diagram of the repulsive Haldane-Hubbard model, varying the interaction strength and the sublattice p…
Larkin-Ovchinnikov phases in two-dimensional square lattices
J. E. Baarsma, P. Törmä
We consider a two-component gas of fermions in optical lattices in the presence of a population imbalance within a mean-field theory. We study phase transitions from a normal gas o…
Excitations and impurity dynamics in a fermionic Mott insulator with nearest-neighbor interactions
A. -M. Visuri, T. Giamarchi, P. Törmä
We study analytically and with the numerical time-evolving block decimation method the dynamics of an impurity in a bath of spinless fermions with nearest-neighbor interactions in…
Superfluid phases of fermions with hybridized and orbitals
Shaoyu Yin, J. E. Baarsma, M. O. J. Heikkinen +2
We explore the superfluid phases of a two-component Fermi mixture with hybridized orbitals in optical lattices. We show that there exists a general mapping of this system to the Li…
Dynamical symmetry and pair tunneling in a one-dimensional Bose gas colliding with a mobile impurity
Elmer V. H. Doggen, Sebastiano Peotta, Päivi Törmä +1
Using the time-dependent density matrix renormalization group (TDMRG) we theoretically study the collision of a one-dimensional gas of interacting bosons with an impurity trapped i…
Superfluidity in topologically nontrivial flat bands
Sebastiano Peotta, Päivi Törmä
Topological invariants built from the periodic Bloch functions characterize new phases of matter, such as topological insulators and topological superconductors. The most important…