Dresden 2014 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 102: Cold Atomic Gases - Poster Session
TT 102.5: Poster
Thursday, April 3, 2014, 15:00–19:00, P2
Ferromagnetism in a two-component Bose-Hubbard model with synthetic spin-orbit coupling — Jize Zhao1,2, •Shijie Hu3, Jun Chang4, Ping Zhang1,2, and Xiaoqun Wang5 — 1LCP, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China — 2Beijing Computational Science Research Center, Beijing 100084, China — 3Max-Plank Institute fuer Physik Komplexer Systeme, Dresden 01187, Germany — 4Institute of Theoretical Physics and Kavli Institute for Theoretical Physics, CAS, Beijing 10080, China — 5Department of Physics, Renmin University of China, Beijing 100872, China
We study the effect of the synthetic spin-orbit coupling in a two-component Bose-Hubbard model in one dimension by employing the density-matrix renormalization group method. A ferromagnetic long range order emerges in both Mott insulator and superfluid phases resulting from the spontaneous breaking of the Z2 symmetry, when the spin-orbit coupling term becomes comparable to the hopping kinetic energy and the inter-component interaction is smaller than the intra-one. In the symmetry-broken phase, the system behaves effectively as a one-component model. The novel effects are expected to be detectable with the present realization of the synthetic spin-orbit coupling in experiments.