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Moving perturbation in a one-dimensional Fermi gas
A. -M. Visuri, D. -H. Kim, J. J. Kinnunen +2
We simulate a balanced attractively interacting two-component Fermi gas in a one-dimensional lattice perturbed with a moving potential well or barrier. Using the time-evolving bloc…
Fulde-Ferrell states and Berezinskii-Kosterlitz-Thouless phase transition in two-dimensional imbalanced Fermi gases
Shaoyu Yin, J. -P. Martikainen, P. Törmä
We study the superfluid properties of two-dimensional spin-population-imbalanced Fermi gases to explore the interplay between the Berezinskii-Kosterlitz-Thouless (BKT) phase transi…
Tunable critical supercurrent and spin-asymmetric Josephson effect in superlattices
Juha M. Kreula, Miikka O. J. Heikkinen, Francesco Massel +1
Combining the Josephson effect with magnetism, or spin dependence in general, creates novel physical phenomena. The spin-asymmetric Josephson effect is a predicted phenomenon where…
Collective excitations of a trapped Fermi gas at finite temperature
A. Korolyuk, J. J. Kinnunen, P. Törmä
We study collective excitations of a trapped Fermi gas at finite temperature using the Bogoliubov-deGennes mean-field theory in conjunction with the generalized random phase approx…
Finite temperature stability and dimensional crossover of exotic superfluidity in lattices
Miikka O. J. Heikkinen, Dong-Hee Kim, Päivi Törmä
We investigate exotic paired states of spin-imbalanced Fermi gases in anisotropic lattices, tuning the dimension between one and three. We calculate the finite temperature phase di…