Position-dependent spin-orbit coupling for ultracold atoms

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Su, S-W; Gou, S-C; Liu, I-K; Spielman, I. B.; Santos, Luis et al.: Position-dependent spin-orbit coupling for ultracold atoms. In: New Journal of Physics 17 (2015), 33045. DOI: http://dx.doi.org/10.1088/1367-2630/17/3/033045

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Sum total of downloads: 158




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We theoretically explore atomic Bose-Einstein condensates (BECs) subject to position-dependent spin-orbit coupling (SOC). This SOC can be produced by cyclically laser coupling four internal atomic ground (or metastable) states in an environment where the detuning from resonance depends on position. The resulting spin-orbit coupled BEC (SOBEC) phase separates into domains, each of which contain density modulations-stripes-aligned either along the x or y direction. In each domain, the stripe orientation is determined by the sign of the local detuning. When these stripes have mismatched spatial periods along domain boundaries, non-trivial topological spin textures form at the interface, including skyrmions-like spin vortices and anti-vortices. In contrast to vortices present in conventional rotating BECs, these spin-vortices are stable topological defects that are not present in the corresponding homogenous stripe-phase SOBECs.
License of this version: CC BY 3.0 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2015-03-31
Appears in Collections:Fakultät für Mathematik und Physik

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pos. country downloads
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1 image of flag of Germany Germany 118 74.68%
2 image of flag of United States United States 24 15.19%
3 image of flag of China China 11 6.96%
4 image of flag of Taiwan Taiwan 2 1.27%
5 image of flag of Ukraine Ukraine 1 0.63%
6 image of flag of India India 1 0.63%
7 image of flag of Brazil Brazil 1 0.63%

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