Theoretical Research Of The Spin Structure Of An Indirect Exciton

It has gone through a long process from proposing to realizing for Bose Einstein condensates(BEC).For the phenomenon of condensation experiment,the condensation of Ru,Li and Na atoms was the most interesting.However,the researchers did not present a perfect condensation phenomenon,and did not give a good explanation for the experimental phenomena.As the smallest mass boson,the experimental temperature of exciton condensation is several orders of magnitude higher than that of the atom.Through the coupling of the indirect excitons in the double quantum well structure,the Butov team presents a novel exciton emission pattern and spin structure.In order to solve the problem of exciton spin structure,we mainly consider three factors,such as kinetic energy,spin orbit coupling interaction and nonlinear interaction between particles.The spin orbit interaction is a Dresselhauss spin orbit interaction,and the nonlinear interaction between particles is considered as the attraction between two particles and the repulsion between the three particles.Finally,a generalized Gross-Pitaevskii equation including loss and amplification is used to study the internal imbalance of the system.In the simulation process,we first observe the energy level degeneracy in the quantum well structure,and compare the Dresselhauss spin orbit coupling(SOC)interaction on the energy level degeneracy.Secondly,the observation of electron and hole two charged particles and the particle density distribution of rejection wave function under the interaction of the Dresselhauss spin orbit interaction and particle,provide a preliminary theoretical basis for the study of exciton condensation.In the end,we obtain the circularly polarized luminescence pattern and the linearly polarized light emission pattern of the exciton.Compared with the experimental results,the exciton emission patterns in coupled quantum well structures are preliminarily explained.