论文标题
Wigner的朋友场景具有非侵入性弱测量
Wigner Friend scenarios with non-invasive weak measurements
论文作者
论文摘要
Wigner的朋友情景（其中外部代理在机械上描述了一个实验室，在该实验室中进行了测量 - 因此由于量子测量的模棱两可而导致可能的不一致。在这项工作中，我们研究了Wigner朋友的场景，其中外部代理可以以非侵入性方式探测实验室内部动力学。我们检查了可能非常微弱的探针与朋友测量的系统，或实验室内的指针或环境。这些耦合（称为弱测量值）在渐近上很小，并且不会改变朋友获得的结果或概率。在我们的方案中，我们表明弱耦合探针向外部药物表示如何获得一致的预测，而与量子测量理论的可能性无关。这些非侵入性耦合可以通过当今的技术实施。
Wigner Friend scenarios -- in which an external agent describes quantum mechanically a laboratory in which a Friend is making a measurement -- give rise to possible inconsistencies due to the ambiguous character of quantum measurements. In this work, we investigate Wigner Friend scenarios in which the external agents can probe in a non-invasive manner the dynamics inside the laboratories. We examine probes that can be very weakly coupled to the systems measured by the Friends, or to the pointers or environments inside the laboratories. These couplings, known as Weak Measurements, are asymptotically small and do not change the outcomes obtained by the Friends nor their probabilities. Within our scheme, we show that the weakly coupled probes indicate to the external agents how to obtain consistent predictions, irrespective of the possible inconsistencies of quantum measurement theory. These non-invasive couplings could be implemented with present-day technologies.
