Characterizing the temporal rotation and radial twist of the interference pattern of vortex beams

Nie, Longzhi; Kong, Lingran; Gao, Tianyou; Dong, Nenghao; Jiang, Kaijun

doi:10.1016/j.optcom.2022.128339

Cited by 7 publications

(1 citation statement)

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“…The atomic system obtains orbital angular momentum from the copropagating LG beams via Raman transitions among the internal hyperfine states of atoms, whereas the transfer of photon momentum into atoms is suppressed [19,20]. Within SOAM coupling, several in-triguing quantum phases have been predicted theoretically [21][22][23][24][25][26][27][28][29][30][31][32] and observed experimentally [19,20,33,34]. In these studies, however, interactions between atoms play tiny role in the various quantum phases, and one mainly focus on the weakly interacting regime.…”

Section: Introductionmentioning

confidence: 99%

Quantum phases of spin-orbital-angular-momentum coupled bosonic gases in optical lattices

Cao,

Han,

et al. 2022

Preprint

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Spin-orbit coupling plays an important role in understanding exotic quantum phases. In this work, we present a scheme to combine spin-orbital-angular-momentum (SOAM) coupling and strong correlations in ultracold atomic gases. Essential ingredients of this setting is the interplay of SOAM coupling and Raman-induced spin-flip hopping, engineered by lasers that couples different hyperfine spin states. In the presence of SOAM coupling only, we find rich quantum phases in the Mottinsulating regime, which support different types of spin textures such as spin vortex and nonrotating Mott core. Based on an effective exchange model, we find that these competing spin textures are a result of the interplay of Dzyaloshinskii-Moriya and Heisenberg exchange interactions. In the presence of both SOAM coupling and Raman-induced spin-flip hopping, more many-body phases appear, including canted-antiferromagnetic and stripe phases. Our prediction suggests that SOAM coupling could induce rich exotic many-body phases in the strongly interacting regime.

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