期刊
PHYSICAL REVIEW LETTERS
卷 121, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.113204
关键词
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资金
- MOST [100-2112-M-001-027-MY3, 104-2112-M-001-006-MY3]
- Career Development Awards in Academia Sinica
- NCTS ECP1
- JSPS KAKENHI Grants [JP15K17726, JP16H00989]
We demonstrate coupling between the atomic spin- and orbital-angular momentum (OAM) of the atom's center-of-mass motion in a Bose-Einstein condensate (BEC). The coupling is induced by Raman-dressing lasers with a Laguerre-Gaussian beam and creates coreless vortices in an F = 1 Rb-87 spinor BEC. We observe correlations between spin and OAM in the dressed state and characterize the spin texture; the result is in good agreement with the theory. In the presence of the Raman field, our dressed state is stable for 0.1 s or longer, and it decays due to collision-induced relaxation. As we turn off the Raman beams, the vortex cores in the bare spin |m(F) = 1 > and | - 1 > split. These spin-OAM coupled systems with the Raman-dressing approach have great potential for exploring new topological textures and quantum states.
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