标题： 从单个量子中提取信息 显示英文标题

标题： Extraction of information from a single quantum

摘要： 我们研究了使用广义部分测量和测量反转技术对单个量子比特进行量子层析成像的可能性。 利用统计决策理论的概念，我们证明了令人惊讶的是，使用这种方案无法获得任何信息。 研究表明，无论使用何种测量技术，从单个量子中提取信息都与量子物理的其他一般原理相矛盾。 显示英文摘要

摘要： We investigate the possibility of performing quantum tomography on a single qubit with generalized partial measurements and the technique of measurement reversal. Using concepts from statistical decision theory, we prove that, somewhat surprisingly, no information can be obtained using this scheme. It is shown that, irrespective of the measurement technique used, extraction of information from single quanta is at odds with other general principles of quantum physics.