一个量子比特在同时受到经典驱动和多个热库作用模型中的相位计算精度研究  

作　　者：李文奎 贺志[1] 

机构地区：[1]湖南文理学院物理与电子科学学院,湖南常德415000

出　　处：《科学技术创新》2018年第29期4-6,共3页Scientific and Technological Innovation

基　　金：湖南省光电信息技术虚拟仿真实验教学中心项目(湘教通[2015]274);湖南省光电信息技术校企联合人才培养基地项目

摘　　要：精确求解了考虑有经典驱动和多个热库情况下衰减的Jaynes-Cummings模型,得到了其开放两能级系统约化密度算符的解析表达式。进一步讨论了经典驱动和热库数对开放两能级系统相位计算精度的影响。结果显示:通过调节经典驱动强度,两能级系统的相位计算精度能得到明显地提高。The Jaynes-Cummings model considering the attenuation of classical driving and multiple heat stores is solved ex- actly, and the analytical expression of the reduced density operator of the open two-level system is obtained. The influence of the classical driving and thermal bath numbers on the precision of phase estimation of the open two-level system is further discussed. The results show that, the precision of phase estimation can be obviously enhanced by adjusting the classical driving strength.

关 键 词：经典驱动 热库数 衰减的J-C模型 相位计算精度 

分 类 号：O469[理学—凝聚态物理]