Entanglement and discord assisted entropic uncertainty relations under decoherence

作     者：YAO ChunMei CHEN ZhiHua MA ZhiHao SEVERINI Simone SERAFINI Alessio 

作者机构：Department of Physics and Electronic Science Hunan University of Arts and Science Department of Physics and Astronomy University College London Department of Science Zhijiang College Zhejiang University of Technology Centre for Quantum Technologies National University of Singapore Department of Mathematics Shanghai JiaoTong University Department of Computer ScienceUniversity College London Gower Street 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2014年第57卷第9期

页      面：1703-1711页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 080202[工学-机械电子工程] 08[工学] 0804[工学-仪器科学与技术] 0802[工学-机械工程] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.61144006,11201427 and 10901103) the Foundation of China Scholarship Council,the Project Fund of Hunan Provincial Scienceand Technology Department(Grant No.2010FJ3147) the Fund of Hunan Provincial Key Laboratory of Photoelectric Information Integration and Optical Manufacturing Technology,the Educational Committee of the Hunan Province of China through the Overseas Famous Teachers Programme 

主　　题：entropic uncertainty relation entanglement quantum discord decoherence Markovian and non-Markovian reservoirs 

摘      要：The uncertainty principle is a crucial aspect of quantum *** has been shown that quantum entanglement as well as more general notions of correlations,such as quantum discord,can relax or tighten the entropic uncertainty relation in the presence of an ancillary *** explored the behaviour of entropic uncertainty relations for system of two qubits—one of which subjects to several forms of independent quantum noise,in both Markovian and non-Markovian *** uncertainties and their lower bounds,identified by the entropic uncertainty relations,increase under independent local unital Markovian noisy channels,but they may decrease under non-unital *** behaviour of the uncertainties(and lower bounds)exhibit periodical oscillations due to correlation dynamics under independent non-Markovian *** addition,we compare different entropic uncertainty relations in several special cases and find that discord-tightened entropic uncertainty relations offer in general a better estimate of the uncertainties in play.