模间耦合与一阶类相变  

The Mode Coupling and the First-Order-Like Phase Transition

作　　者：邵初寅[1] 凌寅生[2] 

机构地区：[1]常熟高等专科学校物理系,江苏常熟215500 [2]苏州大学物理系,江苏苏州215000

出　　处：《量子光学学报》2003年第1期20-23,共4页Journal of Quantum Optics

摘　　要：应用弱噪声展开方法,计算了偏离势条件情况下,双模三次激光模型中福克—普朗克方程的近似稳态解。讨论了稳态中最可几光场分布随参量的变化规律。当I2为弱场时,不管考虑Qst(I1,I20)还是约化几率分布 Qst(I1),都可以观察到一阶类相变现象。在双模光场情形,模间耦合对产生一阶类相变的影响不可忽略。?Using the weak noise expansion method, we calculate the approximate stationary solution of the Fokker-Plank equation of the two-mode cubic laser model which is not fitted the potential condition. The most probability distribution of the intensity of the laser under the stationary condition. Is disucssed if I2 is weak, we can observe the first-order-like phase transition phenomenon for the Qst(I1,I20) or reduced probability distribution st(I1). For the two-mode laser case the influence of the mode coupling to the first-order-like transition can not been neglected.

关 键 词：量子光学 一阶类相变 模间耦合 弱噪声展开方法 偏离势 双模三次激光模型 福克-普朗克方程 近似稳态解 

分 类 号：O431.2[机械工程—光学工程]