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Spin-orbit-coupled Bose-Einstein condensate in a tilted optical lattice
NORDITA, Stockholm, Sweden.
NORDITA Stockholm, Sweden.
NORDITA Stockholm, Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry, Quantum Chemistry. (Quantum information theory)
2010 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 82, no 4, 043620- p.Article in journal (Refereed) Published
Abstract [en]

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.



Place, publisher, year, edition, pages
APS , 2010. Vol. 82, no 4, 043620- p.
Keyword [en]
optical lattice, Bose-Einstein condensate, spin-Hall effect, Bloch oscillations
National Category
Physical Sciences Atom and Molecular Physics and Optics Condensed Matter Physics
Research subject
Physics; Physics with spec. in Atomic, Molecular and Condensed Matter Physics
URN: urn:nbn:se:uu:diva-133430DOI: 10.1103/PhysRevA.82.043620ISI: 000283416300009OAI: oai:DiVA.org:uu-133430DiVA: diva2:369451
Swedish Research Council
Additional address (E. Sjöqvist): Centre for Quantum Technologies, NUS, SingaporeAvailable from: 2010-11-10 Created: 2010-11-10 Last updated: 2011-10-06Bibliographically approved

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Publisher's full texthttp://arxiv.org/abs/1001.2527

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