Dicke模型中的Berry相位和光子统计分布  

Berry phase and photon statistics distribution in Dicke model

作　　者：吕小茜 于肇贤[1] 

机构地区：[1]北京信息科技大学理学院,北京100192

出　　处：《北京信息科技大学学报（自然科学版）》2016年第2期92-94,共3页Journal of Beijing Information Science and Technology University

摘　　要：对一个单模型光场中,处在旋转波近似条件下的Dicke模型问题,提出了在热力学极限和非共振耦合情况下,Dicke模型的Berry相和光子统计分布理论;通过Dicke模型中Berry相的表示式和Mandel光子的统计分布定义式,进行相应的定态处理和代数计算,确定了位于基态的Berry相与原子的数目,原子和光场之间的耦合强度,电磁波的频率和原子2个能级之间的能量差有一定的关联性,而位于基态的光子表现出亚泊松分布。The Berry phase and photon statistics distribution of Dicke model are studied in the cases of thermodynamical limit and the off-resonant coupling. It is found that the Berry phase under the ground state is related to the atom number,the coupling strength between the atom and the light field,the frequency of the electromagnetic wave and the energy difference between two levels of the atom. The photons exhibit the sub-Poissonian distribution under the ground state.

关 键 词：DICKE模型 基态 BERRY相 亚泊松光子分布 

分 类 号：O413.1[理学—理论物理]