a Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China; b School of Physics & Electronics, Henan University, Kaifeng 475001, China
Abstract This paper proves that a set of orthogonal pure states are indistinguishable by restricted local projective measurement and classical communication if the sum of their Schmidt ranks is larger than the dimension of their joint Hilbert space. This result is useful in determining the local distinguishability of quantum states and is stronger in some respects than that of Hayashi et al [Phys. Rev. Lett. 96, 040501]. In addition, it presents a new method to determine the local distinguishability of orthogonal states by projecting measurement operators into their subspaces.
Received: 26 November 2008
Revised: 06 January 2009
Accepted manuscript online:
Fund: Project
supported by National Fundamental Research Program of China (Grant
No 2006CB921900), the Innovation Funds from the Chinese Academy of
Sciences, and National Natural Science Foundation of China (Grant
Nos 60621064, 10574126, 10875110 and 60836001).
Cite this article:
Jiang Wei(姜伟), Ren Xi-Jun(任喜军), Zhou Xing-Xiang(周幸祥), Zhou Zheng-Wei(周正威), and Guo Guang-Can(郭光灿) Local distinguishability by projective measurement 2009 Chin. Phys. B 18 3243
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
