量子力学论文.doc

三粒子体系中的Wigner-Yanse偏振信息收稿日期::.
基金项目:国家教育部“高等学校高层次创造性人才计划”“2008高等学校青年骨干教师国内访问学者项目”;安徽省教育厅高校省级自然科学研究项目(批准号:KJ2008B83ZC)资助课题;安徽省高校省级自然科学研究项目(批准号:KJ20
11Z234).
作者简介:姜广军((1966-)),,男,, 吉林人,,硕士,,副教授,,主要从事大学物理和物理实验教学;付静(197980-),女男,吉林人,硕士,讲师,主要从事量子光学和量子信息的研究;袁明霞(1983-),女,吉林人,硕士,助教,主要从事大学物理及物理实验教学
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.E-mail:2005@***@..
通讯作者: E-mail:******@.
付静,E-mail:l****************@..
付静姜广军, 付静, 袁明霞
(长春工程学院,吉林建筑工程学院城建学院长春长春 130032130111)
摘要: 针对带有退相干衰减机制的一轴模型和二轴模型,在薛定谔图象图象下一,, 研究了三粒子体系任意时刻的量子态及最大Wigner-
Yanse偏振信息. 结果表明:体系在非线性相互作用下,, 体系的最大偏振信息始终出现在平面内,, 由于退相干衰减的引入,, 最大偏振信息能够被调节和存储. 对带有最大偏振信息极值的GHZ态, 给出了其出现的条件.
带有极值的最大偏振信息能够被存储起来。
关键词: 一轴模型, 二轴模型,, 最大的退相干, Wigner-Yanse偏振信息
中图分类号: 文献标识码:A
Wigner-Yanse skew information of three-qubit system
JIANG Guang-Jun, FU-JingLIU Wan-Fang, YUAN Ming-Xia ZHANG Li-Hua
(the city college of jilin architectural and civil engineering insituteSchool of Physics and Engineering,Anqing Teachers College, AnqingChangchun 246011130111,China)
Abstract: The decay mechanism is considered in the one-axis twisting model and the two-countertwisting model for three-qubit system. Exact expression of the final states and the maximal Wigner-Yanse skew information(MSI) are given for different model within the Schrödinger picture. One can find that the MSI is always in the plane . Due to the decay mechanism and the nonlinear interaction, the MSI can be modulated and stored. We give the condition for occurrence of GHZ state, in which the MSI can reach the extreme values 9/ study the fidelity in the one-axis twisting model and the one-axis twisting model with transverse field,. The results show that the fidelity is a periodic function in the one-axis twisting model. The period is for the even values of .The fidelity is always at point of and . The fidelity is zero at the half period point and the quantum state pletely fidelity. The period is for the odd
values of . Comparing the even values of case, the fidelity is dep