有限温度影响下光子计数分布的解析演化  

Analytical Evolution of Photocount Distribution at Finite Temperature

作　　者：孟祥国[1] 吴孟艳 刘业欣 MENG Xiangguo;WU Mengyan;LIU Yexin(School of Physical Science and Information Engineering,Shandong Provincial Key Laboratory of Optical Communication Science and Technology,Liaocheng University,Liaocheng 252059,China)

机构地区：[1]聊城大学物理科学与信息工程学院、山东省光通信科学与技术重点实验室,山东聊城252059

出　　处：《聊城大学学报（自然科学版）》2022年第6期31-36,43,共7页Journal of Liaocheng University:Natural Science Edition

基　　金：国家自然科学基金项目(11347026);山东省自然科学基金项目(ZR2020MF113,ZR2017MA011)资助。

摘　　要：基于连续变量热场纠缠态表象理论求解描述有限温度模型的密度算符量子主方程,并给出其解析解的无限维克劳斯算符和表示。利用先进的算符排序法,给出光子计数分布的反正规乘积表示,从而得到有限温度影响下光子计数分布的解析演化规律。研究成果丰富了量子退相干的数理处理方法,并加深了对系统在热通道中发生的退相干行为的认识。Based on the continuous-variable thermal entangled state representations,the master equation of density operator of the system at finite temperature was solved,and its analytical solution as the infinite-dimensional Kraus operator-sum representation was presented.Using the new operator ordering method to give the anti-normal ordering product of photocount distribution,the evolution law of photocount distribution at finite temperature is obtained.These results enrich the mathematical and physical methods concerning quantum decoherence and deepen the understanding of the decoherence behavior of the system in the thermal channel.

关 键 词：热场纠缠态表象 有限温度模型 反正规乘积 光子计数分布 

分 类 号：O413.1[理学—理论物理]