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Title: Spin-orbit-coupled Bose-Einstein condensate in a tilted optical lattice
Authors: Larson, J.
Martikainen, J.-P.
Collin, A.
Sjöqvist, E. 
Issue Date: 25-Oct-2010
Source: Larson, J., Martikainen, J.-P., Collin, A., Sjöqvist, E. (2010-10-25). Spin-orbit-coupled Bose-Einstein condensate in a tilted optical lattice. Physical Review A - Atomic, Molecular, and Optical Physics 82 (4) : -. ScholarBank@NUS Repository.
Abstract: Bloch oscillations appear for a particle in a weakly tilted periodic potential. The intrinsic spin Hall effect is an outcome of a spin-orbit coupling. We demonstrate that both of these phenomena can be realized simultaneously in a gas of weakly interacting ultracold atoms exposed to a tilted optical lattice and to a set of spatially dependent light fields inducing an effective spin-orbit coupling. It is found that both the spin Hall and the Bloch oscillation effects may coexist, showing, however, a strong correlation between the two. These correlations are manifested as a transverse spin current oscillating in-phase with the Bloch oscillations. On top of the oscillations originating from the periodicity of the model, a trembling motion is found which is believed to be atomic Zitterbewegung. It is argued that the damping of these Zitterbewegung oscillations may to a large extent be prevented in the present setup considering a periodic optical lattice potential. © 2010 The American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
ISSN: 10502947
DOI: 10.1103/PhysRevA.82.043620
Appears in Collections:Staff Publications

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