26 pages, 4 figures, some refinements in sections 1 and 2, in Proposition 1, and some new references compared to the earlier version. Moreover, this new version has a new remark (Remark 1) and the old Remark 1 (now Remark 2) has been slightly extended
发表信息:
Journal of Physics A: Mathematical and Theoretical, Vol. 48, No. 25, 255303 (2015)
A robustness measure for incompatibility of quantum devices in the lines of the robustness of entanglement is proposed. The concept of general robustness measures is first introduced in general convex-geometric settings and these ideas are then applied to measure how incompatible a given pair of quantum devices is. The robustness of quantum incompatibility is calculated in three special cases: a pair of Fourier-coupled rank-1 sharp observables, a pair of decodable channels, where decodability means left-invertibility by a channel, and a pair consisting of a rank-1 sharp observable and a decodable channel.
Operational Concealment of Measurement Incompatibility by Quantum Channels: Rank Loss versus Contraction
Jawaharlal Nehru Rajkeeya Mahavidyalaya(贾瓦哈拉尔·尼赫鲁国立学院);University of Electronic Science and Technology of China(电子科技大学);Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China(电子科技大学前沿科学技术研究院)
Natural Framework for Device-Independent Quantification of Quantum Steerability, Measurement Incompatibility, and Self-Testing
我们引入装配矩矩阵的概念,即,期望值矩阵的集合,每个期望值与在转向实验中获得的条件量子态相关联。我们演示了它如何以与设备无关的方式用于量子态和测量表征,即,而不需要对测量或制备装置进行任何假设。具体来说,我们展示了如何使用该方法直接从测量结果之间的相关性来降低底层量子态的可操纵性。将这种与设备无关的定量与Piani和Watrous建立的早期结果相结合[Phys. Rev. Lett. 114,060404(2015)],我们的方法立即提供了关于纠缠的广义鲁棒性的与设备无关的下限,以及潜在的量子态对于一种类型的子信道鉴别问题的有用性。此外,通过证明转向鲁棒性和最近推出的不相容鲁棒性之间的定量关系,我们的方法还允许在Bell型实验中进行的各种测量之间的不相容性的设备独立的量化。明确的例子,这样的界限提供了一种自我测试的执行测量。
Robust device-independent characterization of sharpness and incompatibility of unsharp instruments
College of Physics and Optoelectronic Engineering, Ocean University of China(中国海洋大学物理与电子工程学院);China Mobile (Suzhou) Software Technology Company Limited(中国移动(苏州)软件技术有限公司);Engineering Research Center of Advanced Marine Physical Instruments and Equipment (Ministry of Education), Ocean University of China(中国海洋大学教育部先进海工装备工程研究中心);Qingdao Key Laboratory of Advanced Optoelectronics, Ocean University of China(中国海洋大学青岛先进光电学重点实验室)
Quantifying randomness with measurement incompatibility
Uppsala University(乌普萨拉大学);KTH Royal Institute of Technology and Stockholm University(瑞典皇家理工学院和斯德哥尔摩大学);Leibniz Universität Hannover(汉诺威莱布尼茨大学);University of Jyväskylä(于韦斯屈莱大学)
Connection between the contextuality breaking and incompatibility breaking qubit channels
Indian Institute of Technology Dharwad(达尔瓦德印度理工学院);Patna Science College, Patna University(巴特那大学巴特那理学院);S. N. Bose National Center for Basic Sciences(S.N. 玻色基础科学国家中心)
Measurement incompatibility and quantum steering via linear programming
Sorbonne Université, CNRS, LIP6(索邦大学);Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas (Unicamp)(坎皮纳斯州立大学格列布·瓦塔金物理研究所);Zuse Institute Berlin(柏林齐塞研究所);Inria, ENS de Lyon, UCBL, LIP(法国国家信息与自动化研究所,里昂高等师范学校,里昂第一大学);Berlin Institute of Technology(柏林工业大学)
Necessary and Sufficient Condition for Randomness Certification from Incompatibility
Peking University(北京大学);Applied Quantum Algorithms Leiden(莱顿应用量子算法);Universiteit Leiden(莱顿大学);Shanxi University(山西大学);Peking University Yangtze Delta Institute of Optoelectronics(北京大学长三角光电科学研究院);Hefei National Laboratory(合肥国家实验室);Beijing Academy of Quantum Information Sciences(北京量子信息科学研究院)
本文以测量不相容性刻画非零可认证量子随机性的充要条件,并将操控情形推广至 Bell 情形,证明链式不等式违反可作为可靠随机性见证。
Interplay of Quantum Resources in Nonlocality Tests
Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences, University of Science and Technology of China(中国科学技术大学物理科学学院微尺度物质科学国家研究中心);Shanghai Research Center for Quantum Science and CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China(中国科学技术大学上海量子科学研究中心中科院量子信息与量子物理学前沿卓越创新中心);Hefei National Laboratory, University of Science and Technology of China(中国科学技术大学合肥国家实验室);Center for Quantum Information, Institute for Interdisciplinary Information Sciences, Tsinghua University(清华大学交叉信息研究院量子信息中心);Yau Mathematical Sciences Center, Tsinghua University(清华大学丘成桐数学科学中心)
Quantum Incompatibility in Parallel vs Antiparallel Spins
S. N. Bose National Center for Basic Sciences(S.N. 玻色基础科学国家中心);HUN-REN Institute for Nuclear Research(匈牙利研究与教育网络核物理研究所);Balagarh Bijoy Krishna Mahavidyalaya(巴拉加尔比约伊克里希纳学院);Indian Statistical Institute(印度统计研究所)
Strict hierarchy between $n$-wise measurement simulability, compatibility structures, and multi-copy compatibility
Inria, CPHT, LIX, CNRS, École polytechnique, Institut Polytechnique de Paris(法国国家信息与自动化研究所、高等计算与理论物理中心、信息处理实验室、法国国家科学研究中心、巴黎综合理工学院、巴黎理工学院);Department of Physics “E. Fermi”, University of Pisa(比萨大学“恩里科·费米”物理学系);Sorbonne Université, CNRS, LIP6(索邦大学、法国国家科学研究中心、信息处理实验室)
Factorization of multimeters: a unified view on nonclassical quantum phenomena
Faculty of Information Technology, University of Jyväskylä(于韦斯屈莱大学信息技术学院);Naturwissenschaftlich-Technische Fakultät, Universität Siegen(锡根大学自然科学与技术学院);Univ. Grenoble Alpes, CNRS, Grenoble INP, LIG(格勒诺布尔阿尔卑斯大学、法国国家科学研究中心、格勒诺布尔理工学院、信息学与图像与信号实验室);Laboratoire de Physique Théorique, Université de Toulouse, CNRS, UPS(图卢兹大学理论物理实验室、法国国家科学研究中心、图卢兹第三大学);Institut für Theoretische Physik, Leibniz Universität Hannover(汉诺威莱布尼茨大学理论物理研究所)