混态不确定性关系的实验检验  

Experimental test of the uncertainty relations for mixed states

作　　者：王双 李军利 王慧 孟芳霞 乔从丰 WANG Shuang;LI Junli;WANG Hui;MENG Fangxia;QIAO Congfeng(College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China;School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院大学材料科学与光电技术学院,北京100049 [2]中国科学院大学物理科学学院,北京100049

出　　处：《中国科学院大学学报（中英文）》2021年第6期735-740,共6页Journal of University of Chinese Academy of Sciences

基　　金：国家自然科学基金(11635009,11975236);中国科学院大学优秀青年教师科研能力提升项目资助。

摘　　要：不确定关系是量子理论的核心内容之一,体现为不相容物理量的测量不确定性之间存在着此消彼长的内在平衡关系。截至目前,众多不确定关系在各种物理系统中进行了实验验证,其中绝大多数实验是在纯态量子系统中进行的。本文在相干光制备的偏振混态系统中对直和形式的控制不等式型不确定关系进行实验研究。通过测量偏振光束的斯托克斯参量,实验验证混态直和形式不确定关系。结果表明,所检验的控制不等式不确定关系对于一般的混态系统是最优的。The uncertainty relation lies at the heart of quantum theory and behaves as a trade-off relation between the inherent uncertainties of incompatible observables.Many experiments have been devoted to the test of the various uncertainty relations,where the quantum system are mainly prepared in pure states.Here we present an experimental investigation of the direct sum majorization uncertainty relation for mixed states using the coherent light.By measuring the Stokes parameters of the polarized beams,the direct sum majorization uncertainty relation for general mixed states is verified.The experimental results show that the tested majorization uncertainty relation is optimized for the mixed states.

关 键 词：majorization不确定关系 相干光 混态 斯托克斯参量 

分 类 号：O431.2[机械工程—光学工程]