Spin-Orbital-Angular-Momentum Coupling in Bose-Einstein Condensates

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Spin-Orbital-Angular-Momentum Coupling in Bose-Einstein Condensates

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Title: Spin-Orbital-Angular-Momentum Coupling in Bose-Einstein Condensates
Author(s):
Sun, Kuei (UT Dallas);
Qu, Chunlei (UT Dallas);
Zhang, Chuanwei (UT Dallas)
Item Type: Article
Keywords: Show Keywords
Abstract: Spin-orbit coupling (SOC) plays a crucial role in many branches of physics. In this context, the recent experimental realization of the coupling between spin and linear momentum of ultracold atoms opens a completely new avenue for exploring new spin-related superfluid physics. Here we propose that another important and fundamental SOC, the coupling between spin and orbital angular momentum (SOAM), can be implemented for ultracold atoms using higher-order Laguerre-Gaussian laser beams to induce Raman coupling between two hyperfine spin states of atoms. We study the ground-state phase diagrams of SOAM-coupled Bose-Einstein condensates on a ring trap and explore their applications in gravitational force detection. Our results may provide the basis for further investigation of intriguing superfluid physics induced by SOAM coupling, such as collective excitations.
Publisher: Amer Physical Soc
ISSN: 1050-2947
Persistent Link: http://hdl.handle.net/10735.1/5179
http://dx.doi.org/10.1103/PhysRevA.91.063627
Bibliographic Citation: Sun, Kuei, Chunlei Qu, and Chuanwei Zhang. 2015. "Spin-orbital-angular-momentum coupling in Bose-Einstein condensates." Physical Review A 91(6), doi: 10.1103/PhysRevA.91.063627
Terms of Use: ©2015 American Physical Society
Sponsors: This work is supported by ARO (W911NF-12-1-0334) and AFOSR (FA9550-11-1-0313, FA9550-13-1-0045).

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