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Cold collisions in dissipative optical lattices
J. Piilo, K. -A. Suominen
In the past, light-assisted cold collisions between laser cooled atoms have been widely studied in magneto-optical atom traps (MOTs). We describe here theoretical studies of dynami…
Collective molecule formation in a degenerate Fermi gas via a Feshbach resonance
Juha Javanainen, Marijan Kostrun, Yi Zheng +6
We model collisionless collective conversion of a degenerate Fermi gas into bosonic molecules via a Feshbach resonance, treating the bosonic molecules as a classical field and seed…
New Directions in Degenerate Dipolar Molecules via Collective Association
Matt Mackie, Olavi Dannenberg, Jyrki Piilo +2
We survey results on the creation of heteronuclear Fermi molecules by tuning a degenerate Bose-Fermi mixture into the neighborhood of an association resonance, either photoassociat…
Topological Defects in Ferromagnetic, Antiferromagnetic and Cyclic Spinor Condensates -- A Homotopy Theory
Yunbo Zhang, Harri Mäkelä, Kalle-Antti Suominen
We apply the homotopy group theory in classifying the topological defects in atomic spin-1 and spin-2 Bose-Einstein condensates. The nature of the defects depends crucially on the…
Improved efficiency of stimulated Raman adiabatic passage in photoassociation of a Bose-Einstein condensate
Matt Mackie, Kari Harkonen, Anssi Collin +2
We theoretically examine Raman photoassociation of a Bose-Einstein condensate, revisiting stimulated Raman adiabatic passage (STIRAP). Due to collisional mean-field shifts, efficie…
Center of mass rotation and vortices in an attractive Bose gas
Anssi Collin, Emil Lundh, Kalle-Antti Suominen
The rotational properties of an attractively interacting Bose gas are studied using analytical and numerical methods. We study perturbatively the ground state phase space for weak…