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Quantum Phases of Two-Component Bosons with Spin-Orbit Coupling in Optical Lattices



Ian B. Spielman, Carlos S? de Melo, Daisuke Yamamoto


Ultracold bosons in optical lattices are one of the few systems where bosonic matter is known to exhibit strong correlations. Here, to push the frontier of our understanding of interacting bosons in optical lattices, we add synthetic spin-orbit coupling and show that new kinds of density- and chiral-orders develop. In the presence of the characteristic lengths of spin-orbit coupling and optical lattices, which can be made comparable in experiments, the spin hybridization induced by Rabi coupling and interparticle interactions create a rich variety of quantum phases including uniform and non-uniform superfluids, phase separation, and Mott insulators. The spontaneous symme- try breaking phenomena at the transitions between them are explained by a two-order- parameter Ginzburg-Landau model with multiparticle umklapp processes. Finally, in order to characterize each phase, we calculated their momentum distributions, which can be measured experimentally.
Physical Review Letters


Bose Einstein Condensate, Mott Insulator, spin orbit coupling


Spielman, I. , S?, C. and Yamamoto, D. (2017), Quantum Phases of Two-Component Bosons with Spin-Orbit Coupling in Optical Lattices, Physical Review Letters, [online], (Accessed May 21, 2024)


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Created December 26, 2017, Updated April 2, 2018