Numerical analysis of cold-atom spin texture manipulated by the Laguerre-Gaussian laser beams

Abstract

Abstract: Ultra-cold atomic spinor Bose-Einstein condensate has many spin textures with different topological properties, which can provide an ideal quantum simulation platform for the study of topological structures in condensed matter physics and particle physics. The Laguerre-Gaussian beam has special spatial structure and carrys a certain orbital angular momentum, which has been used to research spintexture in ultra-cold atoms. Studying the two-photon Raman process in F = 1 three level atom system driven by Laguerre-Gaussian light by numerical simulation can obtain Skyrmion when the initial state is the ferromagnetic phase or the polarization phase under the condition that the beam waist is comparable with the size of the atomic cloud, and based on that, a numerical method for acquiring precise beam waist can be proposed, which provides a reference for subsequent experiments.

Key words: quantum optics, Laguerre-Gaussian beam, Raman process, spin texture, Skyrmion

CLC Number:

O431.2

SHEN Xing, KONG Lingran, LI Ruizong, ZHANG Dongfang, GAO Tianyou, JIANG Kaijun, ∗. Numerical analysis of cold-atom spin texture manipulated by the Laguerre-Gaussian laser beams[J]. Chinese Journal of Quantum Electronics, 2021, 38(1): 25-30.

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