The discussion of the quantum mechanical Wigner’s friend thought experiment has regained intensity. Recent theoretical results and experimental tests restrict the possibility of maintaining an observer-independent notion of measurement outcomes.

中文翻译：

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事实是相对的

量子力学威格纳的朋友思想实验的讨论重新开始。最近的理论结果和实验测试限制了维持与观察者无关的测量结果概念的可能性。