Spin-orbital angular momentum coupling in Bose-Einstein condensate and its spin dynamics

Document Type

Article

Publication Date

9-1-2023

Abstract

We examine the use of Laguerre-Gaussian (LG) laser beams in the tripod scheme to create the coupling between spin and orbital angular momentum in a Bose-Einstein condensate (BEC) confined by a harmonic trap. We derive and solve the Gross-Pitaevskii equation numerically to obtain the density distribution of the BEC. Orbital angular momentum from the LG beam is transferred to the BEC, inducing the formation of a giant vortex at the BEC's centre. The macroscopic flow of spinor BEC around the vortex leads to a persistent spin current in the BEC.

Keywords

Bose-Einstein condensates, Artificial gauge field

Publication Title

Results in Physics

Divisions

PHYSICS

Funders

Ministry of Higher Education Malaysia (MOHE) , under Long-Term Research Grant Scheme (LRGS/1/2020/UM/01/5/1)

Volume

52

Publisher

Elsevier

Publisher Location

RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS

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