TY - JOUR
T1 - Spin-orbital-angular-momentum coupling in Bose-Einstein condensates
AU - Sun, Kuei
AU - Qu, Chunlei
AU - Zhang, Chuanwei
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/6/22
Y1 - 2015/6/22
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84936941373&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84936941373&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.91.063627
DO - 10.1103/PhysRevA.91.063627
M3 - Article
AN - SCOPUS:84936941373
SN - 1050-2947
VL - 91
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 6
M1 - 063627
ER -