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9 papers · 1 filter
Phase transitions in dipolar spin-1 Bose gases
Ville Pietilä, Mikko Möttönen
We study phase transitions in homogeneous spin-1 Bose gases in the presence of long-range magnetic dipole-dipole interactions (DDI). We concentrate on three-dimensional geometries…
Collective modes and the speed of sound in the Fulde-Ferrell-Larkin-Ovchinnikov state
M. O. J. Heikkinen, P. Törmä
We consider the density response of a spin-imbalanced ultracold Fermi gas in an optical lattice in the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state. We calculate the collective mo…
Size and dynamics of vortex dipoles in dilute Bose-Einstein condensates
Pekko Kuopanportti, Jukka A. M. Huhtamäki, Mikko Möttönen
Recently, Freilich et al. [Science 329, 1182 (2010)] experimentally discovered stationary states of vortex dipoles, pairs of vortices of opposite circulation, in dilute Bose-Einste…
Exotic superfluid states of lattice fermions in elongated traps
D. -H. Kim, J. J. Kinnunen, J. -P. Martikainen +1
We present real-space dynamical mean-field theory calculations for attractively interacting fermions in three-dimensional lattices with elongated traps. The critical polarization i…
Helical spin textures in dipolar Bose-Einstein condensates
J. A. M. Huhtamäki, P. Kuopanportti
We numerically study elongated helical spin textures in ferromagnetic spin-1 Bose-Einstein condensates subject to dipolar interparticle forces. Stationary states of the Gross-Pitae…
Spin textures in condensates with large dipole moments
J. A. M. Huhtamäki, M. Takahashi, T. P. Simula +2
We have solved numerically the ground states of a Bose-Einstein condensate in the presence of dipolar interparticle forces using a semiclassical approach. Our motivation is to mode…