The influence of spin relaxation on the entanglement of photon pairs emitted from degenerate exciton quantum dot system
The influence of spin relaxation on the entanglement of photon pairs emitted from degenerate exciton quantum dot system
复制标题
自旋弛豫对简并激子量子点系统发射光子对纠缠的影响
DOI：
10.7498/aps.56.4924
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发表时间：
2007-08
期刊：
影响因子：
--
通讯作者：
Liu Shao-Ding
中科院分区：
文献类型：
--
作者：
Cheng Mu-Tian;Wang Qu-Quan;Wang Xia;Liu Shao-Ding
利用粒子数运动方程和量子回归理论，计算了单个半导体量子点双激子体系脉冲激发下粒子在各能级间辐射跃迁的二阶交叉相关函数以及系统发射光子对的偏振密度矩阵.研究了简并激子态单量子点发射光子对的纠缠度，并讨论了纠缠度与自旋弛豫率的关系.研究表明，激子自旋弛豫会破坏该系统发射光子对的纠缠度.
The second-order cross correlation function of the photon emission and the polarization density matrix of the photon pairs emitted from the biexciton system of single semiconductor quantum dots under pulsed excitation were calculated using the dynamical population density matrix equations and quantum regression theorem. The entanglement of the photon pairs emitted from the single quantum dot with degenerate exciton states were investigated, and the relationship between the entanglement and the spin relaxation rate was also discussed. The simulations revealed that the spin relaxation destroys the entanglement of the photon pairs emitted from this system.