V. Marchukov, O.3; G. Volosniev, A.2; V. Fedorov, D.3; S. Jensen, A.3; Zinner, Nikolaj Thomas3
1 Department of Physics and Astronomy, Science and Technology, Aarhus University2 Department of Physics and Astronomy, Faculty of Science, Aarhus University, Aarhus University3 Department of Physics and Astronomy, Science and Technology, Aarhus University
We consider a spin-orbit coupled system of particles in an external trap that is represented by a deformed harmonic oscillator potential. The spin-orbit interaction is a Rashba interaction that does not commute with the trapping potential and requires a full numerical treatment in order to obtain the spectrum. The effect of a Zeeman term is also considered. Our results demonstrate that variable spectral gaps occur as a function of strength of the Rashba interaction and deformation of the harmonic trapping potential. The single-particle density of states and the critical strength for superfluidity vary tremendously with the interaction parameter. The strong variations with Rashba coupling and deformation implies that the few- and many-body physics of spin-orbit coupled systems can be manipulated by variation of these parameters.
Journal of Physics B: Atomic, Molecular and Optical Physics, 2013, Vol 46, Issue 134012