四川大学学报（自然科学版）2017，Vol.54Issue(4)：785-790,6.DOI:10.3969/j.issn.0490-6756.2017.04.020
在量子信息分裂中利用局部测量提高量子参数估计
Improving quantum parameter estimation by partial measu rements in quantum information splitting
摘要
Abstract
We realize the quantum information splitting with respect to phase parameter through the quantum channel with multi-partite entangled states in the condition of the environmental noise.The protocol of quantum information splitting is that the information encoded in quantum parameters from a sender can be recovered at any one of many receivers by means of measurements.It is found that a general partial measurement can help to enhance the quantum Fisher information under the influence of amplitude-damping noise.In the Markovian case,the values of quantum Fisher information are decreased monotonically.In the non-Markovian case,there exists the oscillation of quantum Fisher information.关键词
局部测量/量子Fisher信息量/量子信息分裂/多体量子纠缠/量子退相干Key words
Partial measurement/Quantum Fisher information/Quantum information splitting/Multipartite entangled state/Quantum decoherence分类
数理科学引用本文复制引用
谢燕青,严凯,黄雨梦,郝翔..在量子信息分裂中利用局部测量提高量子参数估计[J].四川大学学报（自然科学版）,2017,54(4):785-790,6.基金项目
国家自然科学基金重点项目(11274054) （11274054）
江苏省研究生培养创新工程项目(JGLX15-150) （JGLX15-150）
苏州科技大学研究生科研创新项目(SKYCX16-015) （SKYCX16-015）
