标题： 评论“量子测量中的噪声和扰动：信息论方法” 显示英文标题

标题： Comment on "Noise and Disturbance in Quantum Measurements: An Information-Theoretic Approach"

摘要： 在对F. Buscemi、M.J.W. Hall、M. Ozawa和M.M. Wilde [PRL 112, 050401, 2014, arXiv:1310.6603]工作的评论中，我们指出，在他们最近的工作[PRL 111, 160405, 2013, arXiv:1306.1565]中引入的误差和扰动度量被错误地描述为“纯粹形式的，没有操作对应物”。 我们还指出作者信息中的一个矛盾，即他们的主要结果是针对与状态无关的度量的误差-扰动关系，但其重要性却被声明仅限于离散变量。 相比之下，我们指出这些关系在误差和扰动的与状态有关或与状态无关的度量中所起的独立作用。 显示英文摘要

摘要： In this comment on the work of F. Buscemi, M.J.W. Hall, M. Ozawa and M.M. Wilde [PRL 112, 050401, 2014, arXiv:1310.6603], we point out a misrepresentation of measures of error and disturbance introduced in our recent work [PRL 111, 160405, 2013, arXiv:1306.1565] as being "purely formal, with no operational counterparts". We also exhibit an tension in the authors' message, in that their main result is an error-disturbance relation for state-independent measures, but its importance is declared to be limited to discrete variables. In contrast, we point out the separate roles played by such relations for either state-dependent or state-independent measures of error and disturbance.